new super street engine

gnicholson · 10-05-2018, 02:46 PM

the car is 3150 with me. it also sets a bit high and has the aerodynamics of a similar sized brick. i plan on lowering the front a bit this winter. wanted to let the new springs take a set before cutting them. I thought it would be faster than it is to but I'm sure it's the car and not the engine. It has a 488 rear right now and is going through the traps at about 7400 RPM. I've tried a couple of different converters. Right now I have a very consistent car in the 60 and im extremely happy with how the car drives. i can fab another set of headers if i need to just trying to keep it simple. i definitively agree with staying on the small side with pri tubes.
i talked to you this last weekend in great bend tony. i have the dark red 70 chevelle. thats an awesome nova you have.

Lenny5160 · 10-05-2018, 03:45 PM

Quote:

Originally Posted by gnicholson

i talked to you this last weekend in great bend tony. i have the dark red 70 chevelle. thats an awesome nova you have.

I knew you had some posts on the forum at the time we spoke! Great to actually meet you, and that Chevelle is extremely nice! I've never seen a car that said "Wagner's" on the door that wasn't mint.

Average Joe · 10-05-2018, 06:12 PM

Go big or go home.

X-TECH MAN · 10-05-2018, 07:01 PM

I did not know MPH won races in the .90 classes ?

X-TECH MAN · 10-06-2018, 09:02 AM

quote deleted .........

Tom Goldman · 10-08-2018, 09:15 AM

There is a huge benefit in air flow with the larger bore size although I would go to 4.600" ,the additional .025" would be insignificant .
I would go with the 4.250 stroke and a .400 long rod. ….This has proven to be a good combination for making power thru a very wide RPM band .
On a car as heavy as yours , you will benefit from the 2 1/8" headers even with the larger displacement.
Just don't over cam it with too much duration .

gnicholson · 10-08-2018, 02:24 PM

probably need to drop the gear from a 488 to a 56 if i went the quarter stroke route. the heads i have now are around 325 cc older brodix castings that flow 370 and 310. they are in excellent shape but im sure i would be leaving a bunch of power on the table if i used them but consistency is the game so i bet with the right cam using all the old stuff would work fine. prob make 950 and a bunch of torque. i know that speed doesnt nec win races but being a little closer to the 150 plus guys would help me judge closing distance a little better

1320racer · 10-11-2018, 09:17 AM

I'll take big bore/short stroke over the other way around everyday. My 522 4,560 bore/4.00 stroke makes 947HP with a 4150 carb atop it's small plenum manifold in my 3150 lb. Firebird. The plan is to run S/ST next season and I expect 150MPH on the stop.

5988 · 12-04-2018, 06:57 PM

I had the same 505 combo in my S/G Camaro. I went with a 4.500 bore with the rest of my parts in the new block. It is a 540. The increase in bore size and the 4.250 stroke work great. I picked up 6 MPH on the stop. HP on the 505 was 835 and the 540 is 870. This is on a tight dyno with real numbers. I would buy pistons and a block and call it good. Some flow bench time dont hurt and I ran mine up to 14.8 from 13.2 for compression.

gnicholson · 12-08-2018, 04:54 AM

6 mph is a good gain. it had to have picked up more than 35 hp

10-05-2018, 02:46 PM	#1
gnicholson Member Join Date: Sep 2011 Posts: 100 Likes: 13 Liked 4 Times in 3 Posts	Re: new super street engine the car is 3150 with me. it also sets a bit high and has the aerodynamics of a similar sized brick. i plan on lowering the front a bit this winter. wanted to let the new springs take a set before cutting them. I thought it would be faster than it is to but I'm sure it's the car and not the engine. It has a 488 rear right now and is going through the traps at about 7400 RPM. I've tried a couple of different converters. Right now I have a very consistent car in the 60 and im extremely happy with how the car drives. i can fab another set of headers if i need to just trying to keep it simple. i definitively agree with staying on the small side with pri tubes. i talked to you this last weekend in great bend tony. i have the dark red 70 chevelle. thats an awesome nova you have.

10-05-2018, 06:12 PM	#3
Average Joe Junior Member Join Date: Jan 2007 Posts: 33 Likes: 17 Liked 18 Times in 8 Posts	Re: new super street engine Go big or go home.

10-05-2018, 07:01 PM	#4
X-TECH MAN Banned Join Date: Dec 2007 Location: Lake Placid, Florida Posts: 3,207 Likes: 1,049 Liked 235 Times in 110 Posts	Re: new super street engine I did not know MPH won races in the .90 classes ?

10-06-2018, 09:02 AM	#5
X-TECH MAN Banned Join Date: Dec 2007 Location: Lake Placid, Florida Posts: 3,207 Likes: 1,049 Liked 235 Times in 110 Posts	Re: new super street engine quote deleted ......... Last edited by X-TECH MAN; 10-07-2018 at 01:33 PM.

10-08-2018, 09:15 AM	#6
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,438 Likes: 779 Liked 703 Times in 206 Posts	Re: new super street engine There is a huge benefit in air flow with the larger bore size although I would go to 4.600" ,the additional .025" would be insignificant . I would go with the 4.250 stroke and a .400 long rod. ….This has proven to be a good combination for making power thru a very wide RPM band . On a car as heavy as yours , you will benefit from the 2 1/8" headers even with the larger displacement. Just don't over cam it with too much duration . __________________ Tom Goldman 1500 SG , 1506 STK

10-08-2018, 02:24 PM	#7
gnicholson Member Join Date: Sep 2011 Posts: 100 Likes: 13 Liked 4 Times in 3 Posts	Re: new super street engine probably need to drop the gear from a 488 to a 56 if i went the quarter stroke route. the heads i have now are around 325 cc older brodix castings that flow 370 and 310. they are in excellent shape but im sure i would be leaving a bunch of power on the table if i used them but consistency is the game so i bet with the right cam using all the old stuff would work fine. prob make 950 and a bunch of torque. i know that speed doesnt nec win races but being a little closer to the 150 plus guys would help me judge closing distance a little better Last edited by gnicholson; 10-08-2018 at 02:26 PM.

10-11-2018, 09:17 AM	#8
1320racer VIP Member Join Date: Nov 2007 Location: New Jersey Posts: 1,788 Likes: 71 Liked 415 Times in 200 Posts	Re: new super street engine I'll take big bore/short stroke over the other way around everyday. My 522 4,560 bore/4.00 stroke makes 947HP with a 4150 carb atop it's small plenum manifold in my 3150 lb. Firebird. The plan is to run S/ST next season and I expect 150MPH on the stop.

12-04-2018, 06:57 PM	#9
5988 Junior Member Join Date: Apr 2013 Posts: 3 Likes: 0 Liked 0 Times in 0 Posts	Re: new super street engine I had the same 505 combo in my S/G Camaro. I went with a 4.500 bore with the rest of my parts in the new block. It is a 540. The increase in bore size and the 4.250 stroke work great. I picked up 6 MPH on the stop. HP on the 505 was 835 and the 540 is 870. This is on a tight dyno with real numbers. I would buy pistons and a block and call it good. Some flow bench time dont hurt and I ran mine up to 14.8 from 13.2 for compression.

12-08-2018, 04:54 AM	#10
gnicholson Member Join Date: Sep 2011 Posts: 100 Likes: 13 Liked 4 Times in 3 Posts	Re: new super street engine 6 mph is a good gain. it had to have picked up more than 35 hp