Dissapointment Cont'd
Thread Starter
Racer
Joined: Mar 2007
Posts: 337
Likes: 0
From: yorktown virginia
Dissapointment Cont'd
Here is the dyno graph from when Edmcat tuned my 97... here are the mods list.
-TSP 1-3/4" headers
-3" high flow cats
-LS7 flywheel/clutch/pp
-TSP 233/239 cam
-25% UD pulley
-VaraRam intake
Im looking for more power obviously.. but its not just that.. ive seen dynos of other cars and ridden in a few with smaller cams that "felt" faster. i think TSP advertises that my power starts coming in around 2600 rpms from the cam and i guess i kinda miss that "nitro kick in" feeling from the 224 cams. anyways, im looking to feel like the car just keeps pulling harder and harder. but as you can see she runs outta power up top. like ed said, when he let off you can already see that the power was on the decline. my question is, will stg 2 heads and an ls6 intake mani give me a powerband that exceeds my rpm limitations? coming from a history of forced induction im used to pulling HARD all the way to the top as if if there were no redline it would keep pulling harder. so... now that i think ive singled out the "feeling" im looking for... what are the suggestions for power without going F/I?
p.s. Graph to follow.
-TSP 1-3/4" headers
-3" high flow cats
-LS7 flywheel/clutch/pp
-TSP 233/239 cam
-25% UD pulley
-VaraRam intake
Im looking for more power obviously.. but its not just that.. ive seen dynos of other cars and ridden in a few with smaller cams that "felt" faster. i think TSP advertises that my power starts coming in around 2600 rpms from the cam and i guess i kinda miss that "nitro kick in" feeling from the 224 cams. anyways, im looking to feel like the car just keeps pulling harder and harder. but as you can see she runs outta power up top. like ed said, when he let off you can already see that the power was on the decline. my question is, will stg 2 heads and an ls6 intake mani give me a powerband that exceeds my rpm limitations? coming from a history of forced induction im used to pulling HARD all the way to the top as if if there were no redline it would keep pulling harder. so... now that i think ive singled out the "feeling" im looking for... what are the suggestions for power without going F/I?
p.s. Graph to follow.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Not sure what the link is, you have to be a member to see it.
The LS7 clutch setup will show less power, but if you are still running the LS1 intake, I would start there then move to heads. Did you degree the cam?
The LS7 clutch setup will show less power, but if you are still running the LS1 intake, I would start there then move to heads. Did you degree the cam?
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
That cam with the LS6 manifold - or even better a 90/90 setup - and heads should kick you in the a$$ at 4k and pull hard to about 6600. It will probably still peak at about 6300 but drop off gently. The LS7 clutch is heavy but I still made 460 with a 230-236 112 90/90 PRC 2.5R 5.3 heads with the LS7 clutch.
There are some good deals on heads and LS6 intakes around here. Keep an eye out for those.
BTW: Ed's pretty damn good getting the max safe RWHP out of these engines.
There are some good deals on heads and LS6 intakes around here. Keep an eye out for those.
BTW: Ed's pretty damn good getting the max safe RWHP out of these engines.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
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Thread Starter
Racer
Joined: Mar 2007
Posts: 337
Likes: 0
From: yorktown virginia
car is a MN6.. i have the craptastic stock 97 LS1 heads which is more than likely one of many reasons im down on power. Any idea what length pushrods i should be running? i have 7.4 (factory length) hardened ones in there now. ed and i both agree that she is excessively loud. cam specs for inquiring minds is 233/239 .595/.603
Melting Slicks
Joined: Jul 2006
Posts: 3,356
Likes: 1
From: Chesapeake Va
car is a MN6.. i have the craptastic stock 97 LS1 heads which is more than likely one of many reasons im down on power. Any idea what length pushrods i should be running? i have 7.4 (factory length) hardened ones in there now. ed and i both agree that she is excessively loud. cam specs for inquiring minds is 233/239 .595/.603
I recommend checking the pre-load.
Former Vendor
Joined: Dec 2004
Posts: 678
Likes: 0
From: Trenton NJ
Yeah the stock heads & LS1 intake definitely are not helping you at all, Ed definitely knows what he's doing behind the keyboard so if theres power to be found he would be the one to find it.
-Bill
-Bill
Burning Brakes
Joined: Aug 2004
Posts: 837
Likes: 2
From: Derry NH
If I could find my pushrod length checker I would mail it to you so you could use it. Whereever it is, it is only collecting dust...
That cam seems way big for stock untouched heads.
I am at work and the pics are always blocked so I can't see a graph and have no idea what numbers we are talking about. One thing I have learned in my 4 years with this car is that I would do it all again but in a completely different way... I would spend mad $$$ on good heads and base the rest on that.
That cam seems way big for stock untouched heads.
I am at work and the pics are always blocked so I can't see a graph and have no idea what numbers we are talking about. One thing I have learned in my 4 years with this car is that I would do it all again but in a completely different way... I would spend mad $$$ on good heads and base the rest on that.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Pro
Joined: Aug 2004
Posts: 575
Likes: 0
From: Richmond Hill Ontario
You need to match the cam and heads if you want to achieve max power. You're way overcammed for the heads you have. A good set of heads and a better intake and you'll probably get at least another 45 to 55 hp. I'm running a small cam (212/218) with ported LS6 heads and LS6 intake and made 360rwhp/356ftlbs on the dyno so you will certainly make some good gains with good heads & intake. A good cold air induction system will make will also help a lot as this is one of the areas where the OE induction system is very weak.
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
The heads/intake are definitely not keeping up with that cam. Those heads probably won't effectively support more than a 224 size - or less - cam. You can see where the cam tries to come on at 4k but just can't.
Good news is, now you know what the next step is.
Good news is, now you know what the next step is.
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
car is a MN6.. i have the craptastic stock 97 LS1 heads which is more than likely one of many reasons im down on power. Any idea what length pushrods i should be running? i have 7.4 (factory length) hardened ones in there now. ed and i both agree that she is excessively loud. cam specs for inquiring minds is 233/239 .595/.603
You are in serious need of heads and an LS6 intake. That is not exactly a small cam, and you are starving it of air.