Camshaft HP Gains?
Thread Starter
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Camshaft HP Gains?
I recently upgraded my camshaft, and I'm finally getting around to doing the dyno tuning. Hoping to do the tune next Saturday.
My old camshaft made 358/342 at the wheels. Anyone care to guess the gains/losses from the new camshaft?
Old cam: 212/224 521/536 112 lsa
New cam: 224/230 605/622 112 lsa
I also upgraded the opti (95/96), installed a Cloyes DR timing set, and installed Comp Cams bee hive springs, while the car was down.
If all goes well Saturday and if work permits, I plan on hitting the track the next Tuesday.
-Mike
My old camshaft made 358/342 at the wheels. Anyone care to guess the gains/losses from the new camshaft?
Old cam: 212/224 521/536 112 lsa
New cam: 224/230 605/622 112 lsa
I also upgraded the opti (95/96), installed a Cloyes DR timing set, and installed Comp Cams bee hive springs, while the car was down.
If all goes well Saturday and if work permits, I plan on hitting the track the next Tuesday.
-Mike
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by STL94LT1
I recently upgraded my camshaft, and I'm finally getting around to doing the dyno tuning. Hoping to do the tune next Saturday.
My old camshaft made 358/342 at the wheels. Anyone care to guess the gains/losses from the new camshaft?
Old cam: 212/224 521/536 112 lsa
New cam: 224/230 605/622 112 lsa
I also upgraded the opti (95/96), installed a Cloyes DR timing set, and installed Comp Cams bee hive springs, while the car was down.
If all goes well Saturday and if work permits, I plan on hitting the track the next Tuesday.
-Mike
My old camshaft made 358/342 at the wheels. Anyone care to guess the gains/losses from the new camshaft?
Old cam: 212/224 521/536 112 lsa
New cam: 224/230 605/622 112 lsa
I also upgraded the opti (95/96), installed a Cloyes DR timing set, and installed Comp Cams bee hive springs, while the car was down.
If all goes well Saturday and if work permits, I plan on hitting the track the next Tuesday.
-Mike
Thread Starter
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Originally Posted by Zix
Do you have flow numbers for the heads?
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by STL94LT1
No I don't. CNC Cylinder Heads did the porting, and for some reason Pete isn't big on giving out flow numbers. His belief is, retaining port velocity over peak flow numbers. But, I did read on another site where someone had these heads flow tested, and got 270/199 @ .600 lift.
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Originally Posted by STL94LT1
?
Old cam: 212/224 521/536 112 lsa
New cam: 224/230 605/622 112 lsa
I also upgraded the opti (95/96), installed a Cloyes DR timing set, and installed Comp Cams bee hive springs, while the car was down.
Old cam: 212/224 521/536 112 lsa
New cam: 224/230 605/622 112 lsa
I also upgraded the opti (95/96), installed a Cloyes DR timing set, and installed Comp Cams bee hive springs, while the car was down.
http://www.powerandperformancenews.c...Category_Code=
I made over 390rwhp with CompCam 503 which is also 224/230 112 lsa
Last edited by LT4BUD; Aug 14, 2005 at 09:33 PM.
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Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
Originally Posted by STL94LT1
I recently upgraded my camshaft, and I'm finally getting around to doing the dyno tuning. Hoping to do the tune next Saturday.
My old camshaft made 358/342 at the wheels. Anyone care to guess the gains/losses from the new camshaft?
Old cam: 212/224 521/536 112 lsa
New cam: 224/230 605/622 112 lsa
I also upgraded the opti (95/96), installed a Cloyes DR timing set, and installed Comp Cams bee hive springs, while the car was down.
If all goes well Saturday and if work permits, I plan on hitting the track the next Tuesday.
-Mike
My old camshaft made 358/342 at the wheels. Anyone care to guess the gains/losses from the new camshaft?
Old cam: 212/224 521/536 112 lsa
New cam: 224/230 605/622 112 lsa
I also upgraded the opti (95/96), installed a Cloyes DR timing set, and installed Comp Cams bee hive springs, while the car was down.
If all goes well Saturday and if work permits, I plan on hitting the track the next Tuesday.
-Mike
Good numbers for the small cam. The heads must have been pretty good. I would expect you to be in the 380-390 range with the new cam tuned in well.
This is a stick car ain't it?
Let us know for sure!!
Thread Starter
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Originally Posted by LT4BUD
Which bee hive springs???? I used 26918-16 which are 0.600" max lift??
I installed my springs at a 1.875 installed height, with a .622 lift, there is a .118 clearance before coil bind and Comp recommends at least .060.
I know I'm am pushing the 918's to the limit, and a set of dual springs would have been safer. But, at this time I really didn't want to pull the heads to have them machined for the dual springs.
I will say, I don't think I've ever driven a car that revs as smoothly as my car with this cam/springs combination.
Wish me luck.
-Mike
Thread Starter
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Originally Posted by Alvin
This is a stick car ain't it?
Let us know for sure!!
Let us know for sure!!
I've heard the 4.10's may dyno a little lower than the stock gears. What's you opinion of that statement?
-Mike
Melting Slicks
Joined: Apr 2000
Posts: 3,490
Likes: 2
From: Oviedo FL
This is the same cam I have in my 385 except mine has a 113 LSA. I am using the 977-16 springs which came recommended by Comp Cams for this cam. See sig for numbers.
BTW, I think you will see north of 380 with that cam.
Mike
BTW, I think you will see north of 380 with that cam.
Mike
Thread Starter
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Update
Well after several work related delays. I finally made it to the dyno today. The numbers were pretty good, but I may have hurt the car getting them. Every run at ~5800 rpms the HP would dip and come back at 6200. I tried adding fuel and fuel pressure, didn't help. Checked for spark retard, none. There is a slightly louder ticking noise on the left side, louder than normal. Could it be a loose rocker? Burned plug? Spun rod bearing? Oil and coolant look fine.
Leaving the dyno shop the car was jerking, felt like I had a dead cylinder. As soon as a load is put on the engine it will shake, and has a hard time idling. Limped it home, will be looking into the problem tomorrow.
I did 5 runs each were between 371-374hp and 342-345 tq. Oh, the first run the torque was 398. It broke the tires loose.
Best run was 374/345 (SAE)
-Mike
Leaving the dyno shop the car was jerking, felt like I had a dead cylinder. As soon as a load is put on the engine it will shake, and has a hard time idling. Limped it home, will be looking into the problem tomorrow.
I did 5 runs each were between 371-374hp and 342-345 tq. Oh, the first run the torque was 398. It broke the tires loose.
Best run was 374/345 (SAE)
-Mike