IHRA pure stock

astikhossw · 08-03-2008, 01:52 PM

Can any of you fine stock super stock racer fill me in on the in's and out's of pure stock racing.What i have is a 1969 cobra jet mustang that i have never driven on the street(and i have had it since 1989)and it 's been bracket raced a little,but i am interested in the IHRA pure stock class and just have few question.Like on the sway bar can it be removed,can a mini spool be used,can a msd 6al and timing computer be used,can i use caltrac leaf springs,what type race fuel,and can the 428 adjustable rocker be use.By the way i have read the rule book just had a few question that were not in the book.

Eric Merryfield · 08-03-2008, 06:07 PM

Quote:

Originally Posted by astikhossw

Can any of you fine stock super stock racer fill me in on the in's and out's of pure stock racing.What i have is a 1969 cobra jet mustang that i have never driven on the street(and i have had it since 1989)and it 's been bracket raced a little,but i am interested in the IHRA pure stock class and just have few question.Like on the sway bar can it be removed,can a mini spool be used,can a msd 6al and timing computer be used,can i use caltrac leaf springs,what type race fuel,and can the 428 adjustable rocker be use.By the way i have read the rule book just had a few question that were not in the book.

The only two things that jump out at me are the timing computer and adjustable rockers as to doubtful, if they were stock, you do have to have the heater box, battery up front(ala NHRA stock), original style fuel pump, waterpump, and original lift and duration cam....can run race gas thats on the list for stock, its the pump gas that likely will not pass tech, also you can't have aftermarket brakes, Areo, etc.

Others that race the P/S I am sure will add on to the list.

RJ · 08-03-2008, 08:37 PM

It's to a large degree what NHRA stock used to be about 20 or so years ago - in addition to what has been said, stock valve spring pressure is a requirement. Do get a cam ground for it though, just let the cam people know what spring pressure, overlap, duration, and lift limits you need to follow. If you can't find the specs, one of the long time 428CJ builders on here can help you with them. Your combo should be quite competitive in IHRA pure stock, good luck.

X-TECH MAN · 08-04-2008, 07:07 AM

Keep the sway bar but make it inoperative (spacers). Stock NON-adjustable rockers are required. One angle only on the valves (no back cuts) unless they came from the factory that way (455 S.D. Pontiact, etc.), I doubt they would ever look and check for a mini-spool. Why not just use the Ford Detroit locker? The other posts are correct in that Pure stock is basicly like stockers were built prior to 1985. Its a GOOD combo. I hear they are still trying to decide if the Cal-track springs will be legal. Check with Hank Blakenship on this. Most of the rest of the tech men wont know or dont care. Its been about 7 years since I had any dealings with this but have been keeping track on ocasion and still talk with Hank and Duane Eiskant. Good luck.

astikhossw · 08-04-2008, 08:06 AM

RJ ,is the cam spec that you refer to,would that be the one that is on the NHRA blueprint spec sheet.

X-TECH MAN · 08-04-2008, 08:46 AM

THe cam is much milder. Duration, overlap, and the old lift spec. is required the last time I checked with Duane for pure stock. The new spec. in NHRA's blueprint sheet does not list the stock duration and overlap specs'. The current lift spec. listed is a "SNOW JOB" created by some "creative minds" (?) currently running NHRA stock elimnator who have connections in high places. Yes.....I know it was a FORD CAM but it was NOT the one that was O.E.M. If I can get my old spec. book returned I could help you out but it is in the hands of Duane Eiskant at this time. If not then maybe IHRA will allow you to use the larger cam. JUst call and ask them????

BlueOval Ralph · 08-04-2008, 11:28 AM

Quote:

Originally Posted by X-TECH MAN

Keep the sway bar but make it inoperative (spacers). Stock NON-adjustable rockers are required. One angle only on the valves (no back cuts) unless they came from the factory that way (455 S.D. Pontiact, etc.), I doubt they would ever look and check for a mini-spool. Why not just use the Ford Detroit locker? The other posts are correct in that Pure stock is basicly like stockers were built prior to 1985. Its a GOOD combo. I hear they are still trying to decide if the Cal-track springs will be legal. Check with Hank Blakenship on this. Most of the rest of the tech men wont know or dont care. Its been about 7 years since I had any dealings with this but have been keeping track on ocasion and still talk with Hank and Duane Eiskant. Good luck.

If you use Detroit Locker be sure and cut out center locking ring in locker! This is a old Ford Factory trick
Ralph!

Bud Lefevre · 08-04-2008, 02:02 PM

Quote:

Originally Posted by astikhossw

Can any of you fine stock super stock racer fill me in on the in's and out's of pure stock racing.What i have is a 1969 cobra jet mustang that i have never driven on the street(and i have had it since 1989)and it 's been bracket raced a little,but i am interested in the IHRA pure stock class and just have few question.Like on the sway bar can it be removed,can a mini spool be used,can a msd 6al and timing computer be used,can i use caltrac leaf springs,what type race fuel,and can the 428 adjustable rocker be use.By the way i have read the rule book just had a few question that were not in the book.

Please Email me off list

Bud Lefevre
Maliburac@AOL.COM

08-03-2008, 01:52 PM	#1
astikhossw Member Join Date: Jul 2008 Location: moreno valley Ca Posts: 266 Likes: 2 Liked 20 Times in 9 Posts	IHRA pure stock Can any of you fine stock super stock racer fill me in on the in's and out's of pure stock racing.What i have is a 1969 cobra jet mustang that i have never driven on the street(and i have had it since 1989)and it 's been bracket raced a little,but i am interested in the IHRA pure stock class and just have few question.Like on the sway bar can it be removed,can a mini spool be used,can a msd 6al and timing computer be used,can i use caltrac leaf springs,what type race fuel,and can the 428 adjustable rocker be use.By the way i have read the rule book just had a few question that were not in the book.

08-03-2008, 08:37 PM	#3
RJ Member Join Date: Oct 2002 Posts: 248 Likes: 0 Liked 0 Times in 0 Posts	Re: IHRA pure stock It's to a large degree what NHRA stock used to be about 20 or so years ago - in addition to what has been said, stock valve spring pressure is a requirement. Do get a cam ground for it though, just let the cam people know what spring pressure, overlap, duration, and lift limits you need to follow. If you can't find the specs, one of the long time 428CJ builders on here can help you with them. Your combo should be quite competitive in IHRA pure stock, good luck.

08-04-2008, 07:07 AM	#4
X-TECH MAN Banned Join Date: Dec 2007 Location: Lake Placid, Florida Posts: 3,203 Likes: 1,047 Liked 235 Times in 110 Posts	Re: IHRA pure stock Keep the sway bar but make it inoperative (spacers). Stock NON-adjustable rockers are required. One angle only on the valves (no back cuts) unless they came from the factory that way (455 S.D. Pontiact, etc.), I doubt they would ever look and check for a mini-spool. Why not just use the Ford Detroit locker? The other posts are correct in that Pure stock is basicly like stockers were built prior to 1985. Its a GOOD combo. I hear they are still trying to decide if the Cal-track springs will be legal. Check with Hank Blakenship on this. Most of the rest of the tech men wont know or dont care. Its been about 7 years since I had any dealings with this but have been keeping track on ocasion and still talk with Hank and Duane Eiskant. Good luck.

08-04-2008, 08:06 AM	#5
astikhossw Member Join Date: Jul 2008 Location: moreno valley Ca Posts: 266 Likes: 2 Liked 20 Times in 9 Posts	Re: IHRA pure stock RJ ,is the cam spec that you refer to,would that be the one that is on the NHRA blueprint spec sheet.

08-04-2008, 08:46 AM	#6
X-TECH MAN Banned Join Date: Dec 2007 Location: Lake Placid, Florida Posts: 3,203 Likes: 1,047 Liked 235 Times in 110 Posts	Re: IHRA pure stock THe cam is much milder. Duration, overlap, and the old lift spec. is required the last time I checked with Duane for pure stock. The new spec. in NHRA's blueprint sheet does not list the stock duration and overlap specs'. The current lift spec. listed is a "SNOW JOB" created by some "creative minds" (?) currently running NHRA stock elimnator who have connections in high places. Yes.....I know it was a FORD CAM but it was NOT the one that was O.E.M. If I can get my old spec. book returned I could help you out but it is in the hands of Duane Eiskant at this time. If not then maybe IHRA will allow you to use the larger cam. JUst call and ask them????