Previous Thread
Next Thread
Print Thread
Page 2 of 2 1 2
Re: How much lift can stock hemi heads take? [Re: Steve1118] #2500332
05/25/18 03:28 PM
05/25/18 03:28 PM
Joined: Dec 2005
Posts: 1,494
Shelby mi.
J
JAKE68 Offline
pro stock
JAKE68  Offline
pro stock
J

Joined: Dec 2005
Posts: 1,494
Shelby mi.
Originally Posted By Steve1118
Jim, it can still be done. There are a lot of guys racing old school Hemis in NSS, but, if you are starting from scratch it would be hard to match the cost/performance factor of an Indy headed wedge, which is what most guys use. The heads are about as good as the stock, old school Hemi heads. There is still a lot of old school stuff out there, cams, especially that can be had reasonable. Heads are still pretty reasonable, you can get new ones, but the blocks are getting tough. We built a Hemi Dart out of old school stuff we had laying around, basically a 484 inch crate motor, and it runs 9.70s and does a real good job in NSS. We don't have $10K in the whole car. It can certainly be done.

Personally, I think racing one in NHRA Stock/SS is a pipe dream for most. Barton gets 75K for a motor. That's ridiculous. The motors have become so far away from what they were intended to be it's not even funny. Years back, a buddy of mine who works for Chrysler was pushing hard to force them to keep to stock type cross rams, but the big money guys pushed for the sheetmetal intakes, and now, you have to have a 10,500 rpm motor to compete. Most folks who have this 'dream' really have no concept in what it takes to do it. And, you have to have the money to buy EVERYTHING, not just part of it. If you only have 8 of the state of the art stuff when you should have all ten, you are just pissing your money away, will become discouraged and quit soon.

Put your stuff together, run NSS, and have some fun.

BINGO


JAKES AUTOMOTIVE
Re: How much lift can stock hemi heads take? [Re: JAKE68] #2500351
05/25/18 04:07 PM
05/25/18 04:07 PM
Joined: Jan 2003
Posts: 2,763
Walton's Mountain, Pa
Steve1118 Offline
master
Steve1118  Offline
master

Joined: Jan 2003
Posts: 2,763
Walton's Mountain, Pa
Amen, Gary. Some folks read too many magazines.

Here's what we did for the Dart. We had the car for years, it was an old home brew Hemi Dart, and exact copy of a factory car.

We found a damaged 472 crate motor from Mancini. It had dropped a valve during a dyno session, we got it, the crank, 7 rods, 7 pistons, and one good head. Didn't pay much for it.

Tossed the rods and 7 pistons, swapped the good head for a set of Manley rods, cleaned it up to .30 and bought a set of Diamond pistons. We had a set of stock aluminum MP heads around, got a valve job on them. Found an old Crane R280 roller on ebay. Had it cleaned up, balanced out, and put it together. Used the new MP cross ram with the Holley replacement carburetors. A Turbo Action 4200, shifts at 6600. In the Dart it has gone 9.70@136. Consistent, never work on it, will last forever. Now, we've been doing it a long time, but we aren't geniuses. What we did anyone can do.

Everyone thinks they have to have all this morphodite stuff. You don't. Put it together and have some fun!!! I had a pal who was 'collecting' stuff for a SS/BA 65 Plymouth for thirty years. He never quite got around to do it because he had to get the good stuff. We attended his funeral the other day, and he never did do it. Go have some fun.

Last edited by Steve1118; 05/25/18 04:16 PM.

"Old age and treachery trumps youth and enthusiasm, every time!"

East Central Director / Chrysler Power Magazine

www.reasbeckracing.webs.com
Re: How much lift can stock hemi heads take? [Re: 73DAD] #2500354
05/25/18 04:12 PM
05/25/18 04:12 PM
Joined: Jan 2004
Posts: 4,540
Motor City
6
6PKRTSE Offline
master
6PKRTSE  Offline
master
6

Joined: Jan 2004
Posts: 4,540
Motor City
.650ish is the largest I had run on my old stock iron Hemi heads in my little ole +.030 426" on the street. It was good for a 10:17 in my old combo.

Mopar aluminum Hemi heads now with much more lift than that on my 528".


1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
Re: How much lift can stock hemi heads take? [Re: 73DAD] #2500390
05/25/18 05:38 PM
05/25/18 05:38 PM
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2 Offline
master
astjp2  Offline
master

Joined: Jan 2011
Posts: 4,785
Utah and Alaska
Well old school is great but the cost of building a 426 is the same as building a 572...so you have options that can take either path. It just comes down to what you want to do......


1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!
Re: How much lift can stock hemi heads take? [Re: Steve1118] #2500646
05/26/18 12:12 PM
05/26/18 12:12 PM
Joined: Dec 2006
Posts: 2,094
Byron, NY
W.I.N. Racing Offline
top fuel
W.I.N. Racing  Offline
top fuel

Joined: Dec 2006
Posts: 2,094
Byron, NY
[quote=Steve1118
Good resources for the nostalgia Hemi stuff would be the old DC engine manual, or Larry Shephard's HP book "How to Rebuild and Modify Chrysler 426 Hemi engines". You can probably get it on Amazon. He was a Chrysler engineer that was involved in the initial development, and the race teams of the 60s. [/quote]
iagree
Among the typical concerns when increasing cam size, with a Hemi there is also the concern of valve clipping,(when the intake and Exhaust valve may touch as they pass each other in a cycle). The old DC/Mopar performance books cover most if not all the basics of Hemi building. Some of the methods may be dated but the intent is still valid. twocents

Last edited by W.I.N. racing; 05/26/18 12:12 PM.

'01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60
'01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust,
'05 Dodge Magnum R/T - Too Much to list
'60 Willys CJ5
'01 International LPX - Project,DT466, Allison
'64 Plymouth Valiant, Inj 528 Hemi, 2spd
Re: How much lift can stock hemi heads take? [Re: 73DAD] #2500695
05/26/18 03:02 PM
05/26/18 03:02 PM
Joined: Oct 2007
Posts: 4,205
New York
polyspheric Offline
master
polyspheric  Offline
master

Joined: Oct 2007
Posts: 4,205
New York
he never did do it
ut he had fun planning every day. The journey as well, not just the destination?
And as we all know, no race car is ever finished, there's always something for next season (or your 1040 refund).


Boffin Emeritus
Re: How much lift can stock hemi heads take? [Re: W.I.N. Racing] #2500726
05/26/18 05:42 PM
05/26/18 05:42 PM
Joined: Jan 2003
Posts: 2,763
Walton's Mountain, Pa
Steve1118 Offline
master
Steve1118  Offline
master

Joined: Jan 2003
Posts: 2,763
Walton's Mountain, Pa
You are right about the valve clipping, but that is an issue for real long duration cams more than lift. And, you are right, the info is dated, and probably not much use to someone with 100K to race SS/AH, but for a ham and egg guy like we are it is as valid now as it was then.

Last edited by Steve1118; 05/26/18 05:44 PM.

"Old age and treachery trumps youth and enthusiasm, every time!"

East Central Director / Chrysler Power Magazine

www.reasbeckracing.webs.com
Page 2 of 2 1 2






Powered by UBB.threads™ PHP Forum Software 7.7.1