Re: '67 Camaro E/SA redo
 

I applaud your experimentation with the acc. pump and have done a considerable amount of tinkering myself with very little success. That light spring scares me, though, as the purpose of the accelerator pump is to give a very quick shot of fuel before the main wells and/or power valves get "in the game". Squirter size is another consideration, but on a q-jet not particularly important.

A more important consideration is the choke pull off rate of release in conjuction with the air valve tension (and angle) and being able to adjust them quickly and easily.

Also, I have fought some q-jets that seem to defy all logic and not work in spite of a lot of effort. Sometimes, you just have to set them aside and get another core. Good luck, Ron.

Re: '67 Camaro E/SA redo
 

My train of thought is this - The duration spring is simply a safety device that comes into play when the throttle is slammed suddenly to WOT. With the given metering orifices the liquid in the wells become a solid obstacle at that point and the duration spring prevents binding/lock-up by allowing the spring to do the pushing of the pump cup instead of mechanical input of the linkage. My theory is to calibrate that spring rate in order to extend the time of discharge...no metering orifices have been altered at this point. What I have done is bore the well to .730 to increase the volume of fuel available and I'm using the larger pump from a 2G. I have been using .150 inlet needle/seat, but I'm thinking of dropping back to a .145.

http://i434.photobucket.com/albums/q...psb77db341.jpg

Cliff Ruggles is sending me some adjustable pull offs and the air door settings will be the normal trial and error scenarios. I'm just so happy to be at this point of actual tuning finally instead of breaking parts. :p

Re: '67 Camaro E/SA redo
 

great! you got ahold of him... cant wait to hear how it all works out...

Re: '67 Camaro E/SA redo
 

Well, I have three ready for battle...I hope. Taking the car to a bracket race July 5th and hopefully one will get down the track. :p

http://i434.photobucket.com/albums/q...psfc582d62.jpg

Re: '67 Camaro E/SA redo
 

Your secondaries about 1:1? Worked great on big cube engine... feels good on the 400, but 4.30 just aint enough gear...

Re: '67 Camaro E/SA redo
 

Brent - If you mean have I messed with the secondary opening rates that would be no.

Re: '67 Camaro E/SA redo
 

Nothing better to do today so I took the remainder of my spare Q-jet parts and cobbled together one more carb to take to the track. The main body is a 207 and the rest of it from carbs unknown....145 inlet, 67 primaries and CL rods on a K hanger. Would'nt it be a hoot if this turned out to be "the one" ? :p

http://i434.photobucket.com/albums/q...ps65dfa099.jpg

Going to attempt to tune out any air door bogs on our concrete apron outside the shop on all the carbs before heading to the track.

Re: '67 Camaro E/SA redo
 

I always lied a loose air door and fast pull off, as long as it don't bog you'll be fine. If it bogs tighten door like, or slow down pu off ti it goes away.

Re: '67 Camaro E/SA redo
 

I really saw a difference goin from standard linkage to almost 1:1 ... it was roughly .02-.025 in 60'...maybe a little more when the air was real good... i wouldnt go back the other way, again...it should really come out good, with the 4.88s ... Did you get some of Cliff's acc pumps?

Re: '67 Camaro E/SA redo
 

Semi-homemade on the pumps. I will have Cliff's pull offs in the morning.

Re: '67 Camaro E/SA redo
 

i remember , you run bigger diameter pumps... didnt know that was an option...

Re: '67 Camaro E/SA redo
 

Only one of them has the large pump and it isnt a option...I had to bore the well to .730 and use a pump for a 2G.

Re: '67 Camaro E/SA redo
 

that's what i meant..hehe... Didnt realize you could bore them out, and run bigger dia. pump...

Re: '67 Camaro E/SA redo
 

Not sure in the end if it will make a bit of difference Brent...too many out there running just fine in stock configuration. It was just a brainstorm I had to follow thru on hehe.

Re: '67 Camaro E/SA redo
 

WHen are you testing again? Im testing tomorrow eve... and if all goes well, im running on Friday...Pro/ 1/8 mile, just to get some seat time...

Re: '67 Camaro E/SA redo
 

Going to Buffalo Valley (1/8-mile) Friday night Brent. It's a bracket race so I'll just pick one carb and work with it that night. I have two so far that I believe will get down track without issues...going to tweak on the other two Friday morning to see if I can do anything with them. If things look promising I may haul it to Bowling Green Saturday evening for some 1/4-mile blasts.

Edit : Revision of plans...skipping the bracket race and going straight to Bowling Green Saturday night. More time to spend tuning the carbs for the upcoming Combo races the 18th & 19th.

Re: '67 Camaro E/SA redo
 

4:00 am Sunday morning...just got home from a TNT at Bowling Green. I learned a valuable lesson this evening...I totally suck at building Q-jets. I can take a good one and tune on it, but just can't get one of my own to go down track.

Here is the first pass with the original carb that I had leaned considerably... http://youtu.be/8XWRIGooYyI

The car left strong and ran well down track...first time in a long while it has been in the 1.40 range in 60' times. The mph was down from the normal 113...I assumed it may have been a little too lean.

http://i434.photobucket.com/albums/q...ps24ef4a1e.jpg

The next three runs were with my versions of a '67, Edelbrock, and a Q-jet aptly named "Morphadite" in that order...all total failures to say the least.

http://i434.photobucket.com/albums/q...ps798079b7.jpg

Stock racer Brian Rogers just happened to be at the track last night and he stopped by in staging. He looked the car over well and found nothing totally amiss. We talked a bit and he said he would come over to my pit space after my run to tinker with a carb. After picking my brains for a bit we decided to try an even leaner secondary rod in the original carb that he had run years before he went to a 302 stick shift.

The car felt good from start to finish, but I felt it may have been too lean for the conditions. We made a slightly richer rod change for the final pass of the night and it responded well. I believe I will take Brian's advice about leaving the carb alone for now until I can try someone's known good running carb for comparison. This way I will know if we need to be looking elsewhere for gains or not.

In the two weeks before the upcoming two day Combo race we will do a compression/leak down test on all cylinders just to verify no motor problems. The final two timeslips and with that I'm off to bed. :p

http://i434.photobucket.com/albums/q...psc3d7d26e.jpg

Re: '67 Camaro E/SA redo
 

th,is carb man Jimmy Zasko, e/sa d/sa send me that carb and I will perform the magic, or call me 616 734 4188

Re: '67 Camaro E/SA redo
 

Thanks - The one carb is good to go...it's just the ones I built that suck. ;)

Re: '67 Camaro E/SA redo
 

Making some minor changes before the Combo meet. The header collectors currently on the car may be a tad short and due to the megaphoned style made it difficult to use extensions...

http://i434.photobucket.com/albums/q...psc7790432.jpg

I'm going to swap them out for a straight version and play with the length. Will also hook up the wide band O2 I have been meaning to try...

http://i434.photobucket.com/albums/q...psbdde62ff.jpg

Came up with the idea of cutting one of the lowering blocks on each side of the rear housing to simulate the previously used 2 degree pinion wedges. I think the car liked the extra pinion angle and this will get the job done without having an extra piece floating around in the mix while ensuring positive pin engagement.

Re: '67 Camaro E/SA redo
 

Dig the "MARVY" barber pole! I've had a few over the years.

Re: '67 Camaro E/SA redo
 

Keep us posted.. hope you have a good weekend...

Im gettin ready for Columbus... probably goin in at .3 to .35 under ,, but, i dont care...hehe half the fun is gettin there, right?

Re: '67 Camaro E/SA redo
 

Here is a shot of the lowering blocks I had machined for a 2 degree wedge...sitting at 4 degrees pinion angle now.

http://i434.photobucket.com/albums/q...psd3b3ad1c.jpg

Before and after shots of the collector/extensions...

http://i434.photobucket.com/albums/q...psa0408dc4.jpg

http://i434.photobucket.com/albums/q...ps95d2defb.jpg

Finally rounded up some blocks so I could more easily slip under the car to take measurements. Next set of slicks will be 94" in place of the current 92.5".

http://i434.photobucket.com/albums/q...ps6f2e9e74.jpg

http://i434.photobucket.com/albums/q...psde226269.jpg

Re: '67 Camaro E/SA redo
 

Rich do you have a data logger for the O2? Or a stand alone system? I have a NGK set up on the Camaro and my street car you ill be surprised on what you might see, I know I was. Looks good.

Re: '67 Camaro E/SA redo
 

It's a Zeitronix Zt-3 system I had left over from a turbocharged Harley project. http://www.zeitronix.com/Products/Zt-3/Zt-3.shtml

Re: '67 Camaro E/SA redo
 

Most people say that the 92.5 is the faster tire....why you wanna go with 94"? Gearing? Im probably goin with a 92.5, so i can gain some clearance, and worse case, i go back the 4.30 gear... are your 92.5 tires about worn out? I would like to pick up a good used set, to try on the car...

Re: '67 Camaro E/SA redo
 

When I cut the blocks it raised the rear a bit as you can see in the pic's. It is buzzing the motor pretty good now with the 5.14 gear and 92.5 tires...figure I can accomplish two goals at once with the tire change. Current tires are fresh so it will likely be next season before the swap. I do have the previous set which have only around 50 passes on them if you would like to try.

Before block cut -

http://i434.photobucket.com/albums/q...ps6f1dceac.jpg

After -

http://i434.photobucket.com/albums/q...ps6f2e9e74.jpg

Re: '67 Camaro E/SA redo
 

You will slow that car down with 94" radials. Been there and done it. With the same combo.

Re: '67 Camaro E/SA redo
 

Do you think that was due to the change in overall ratio or tire weight? Hoosier shows the same weight (22lbs) for both tires. What was the difference with your combo?

http://www.hoosiertire.com/Drtire.htm

Re: '67 Camaro E/SA redo
 

The two day Combo meet at Bowling Green this Saturday and Sunday was cut short by one day due to rain. Sunday brought fair weather and the meet went on as planned.

We had some time to kill early Sunday morning before leaving for the track so my partner and I decided to go check out the Corvette Museum since neither of us had ever set foot in the door.

Partner hard at work as usual...

http://i434.photobucket.com/albums/q...pse9562c5b.jpg

I did not have a camera with me so I used the cell phone for the first time in my life...please excuse the quality. It was hard to believe the damage incurred to those cars from the sinkhole...I don't think a car crusher could have done as much damage. Only four cars were salvageable, the rest being totaled. From what I understand the wrecks are to be put back into the hole.

http://i434.photobucket.com/albums/q...ps913b3554.jpg

http://i434.photobucket.com/albums/q...psac1dc91b.jpg

http://i434.photobucket.com/albums/q...ps737861d6.jpg

http://i434.photobucket.com/albums/q...ps34ea98ac.jpg

http://i434.photobucket.com/albums/q...ps944bc726.jpg

http://i434.photobucket.com/albums/q...ps6475271a.jpg

http://i434.photobucket.com/albums/q...ps6f86aa07.jpg

http://i434.photobucket.com/albums/q...ps73f0d50e.jpg

http://i434.photobucket.com/albums/q...ps0b5cd7f3.jpg

Re: '67 Camaro E/SA redo
 

More...

http://i434.photobucket.com/albums/q...ps944bc726.jpg

http://i434.photobucket.com/albums/q...ps6475271a.jpg

http://i434.photobucket.com/albums/q...ps6f86aa07.jpg

http://i434.photobucket.com/albums/q...ps73f0d50e.jpg

http://i434.photobucket.com/albums/q...ps0b5cd7f3.jpg

http://i434.photobucket.com/albums/q...ps90d2810e.jpg

http://i434.photobucket.com/albums/q...psb6868d87.jpg

Re: '67 Camaro E/SA redo
 

Hands down the coolest Corvette I have ever seen...wish I had better pictures.

http://i434.photobucket.com/albums/q...psb6273e87.jpg

http://i434.photobucket.com/albums/q...ps1d4e4d10.jpg

http://i434.photobucket.com/albums/q...ps8b4386ca.jpg

http://i434.photobucket.com/albums/q...psfb8cd9de.jpg

Best pictures I could manage of the sinkhole...

http://i434.photobucket.com/albums/q...psaa583d5b.jpg

http://i434.photobucket.com/albums/q...ps362c702c.jpg

http://i434.photobucket.com/albums/q...ps121d112c.jpg

Hatch where the cranes came in...

http://i434.photobucket.com/albums/q...ps3988ee17.jpg

http://i434.photobucket.com/albums/q...pse8563d25.jpg

Re: '67 Camaro E/SA redo
 

Spied this car on the way out...

http://i434.photobucket.com/albums/q...psd6a53516.jpg

Yeah, we bought twenty tickets...suckers! :p

http://i434.photobucket.com/albums/q...pse3a2d198.jpg

Final point of the evening. I have come to the conclusion there is absolutely nothing wrong with our car other than the fact it simply doesnt make enough horsepower to compete with other cars in it's class. Motor is coming out and we will see what can be done to rectify the situation...maybe some new paint at the same time. I'll post any progress.

Re: '67 Camaro E/SA redo
 

Amazing the damage done there.


I did not want to come on here and post sooner as to why your car was somewhat slow untill you realized yourself the engine is not making the HP it needs to.

MPH is always a good indicator and your numbers are weak...

I would expect it needs to run at least 115-116 to be decent.

Re: '67 Camaro E/SA redo
 

Agreed Rich - We have exhausted all other possibilities and feel the rest of the combination is spot on...all we need now is a motor to complete it.

Re: '67 Camaro E/SA redo
 

On our journey from Lexington to Nashville a couple of weeks ago from and to a basketball tourney, we stopped by the Corvette Museum. What a spectacle! I agree, I don't think a car crusher could do any worse damage to the 4 totaled Vettes. Otherwise, a great tour stop. My first time there.

Thanks for posting the pics.

Re: '67 Camaro E/SA redo
 

Hated to do it at this point in the year, but something has to be done to find some hp. I'm going to try to reuse the stock block if possible this go round...efforts will be centered mainly on internal drag and windage, then on to the heads, intake and cam.

http://i434.photobucket.com/albums/q...ps127980db.jpg

Ambitious as usual I stripped the decals off the body (along with some of the paint) in preparation for some new paint.

http://i434.photobucket.com/albums/q...ps0e2de2a7.jpg

Re: '67 Camaro E/SA redo
 

Rich, I sure hope you put the white back on it. '70 Corvette Classic White has to be the best race car white, ever. -Al

Re: '67 Camaro E/SA redo
 

I agree Alan, but my partner wants something with some color to it. I'm leaning toward Sierra Fawn...only 2% of these cars were sold with that color and I have yet to see one on the track. http://www.69pace.com/paint1967sierrafawn.htm

Re: '67 Camaro E/SA redo
 

I vote Fawn - different is better. IMO