QUOTE(custom87blackbird @ Sep 29 2006, 05:17 AM) [snapback]105475[/snapback]
im sorry but 25hp and 30ftlbs is kinda ridiculous, first of all the runners can produce more hp and torque but on a stock 250tpi the most restrictive part of the entire system is the base, not to mention the plenum and all the porting that would have to be done, putting the runners on a stock base would probably reduce hp due to the bottlenecking lip where the bottom of the runner connects to the base, a lip would be created and would cause tirbulance. i could see the 25hp 30ftlbs increase if u port matched the plenum (enlarges runner holes as well as grind out all lips and blockages around runners as well as behind the throttle body) and replaced the base with the larges one out there, prob TPIS bigmouth. also with all the added air you would prob have to put an Adjustable fuel pressure regulator and increase the pressure so more fuel is added with the new found air. only now could u possibling be making the hp that u thought u would get with the runners, but ur also out...349(runners) 450(base) 50(regulator) almost 900$ and you still havent done any of the porting or anything. who ever told u that u can produce that much hp from a runner change is retarded. edelbrock, SLP, Accel, can only produce 10-15hp more from a runner exchange and SLP is the only one that can make 15hp (due to its 3 inches of siamesed runners. A HSR can only produce 30hp over a stock TPI system on a stock 350 and that will flow more than any TPI system. dont get screwed on this, expect to be in the 900$ range for the power they proclaim. I know bc i had to do all this from an SLP upgrade. they do look like good runners though i would do the whole thing, base, runners etc
Well, I'm sorry you feel that way. I guess I'm just going to have to prove you wrong aren't I ? ... J/K :wink:
For the record, it wasn't me that came up with those performance claims. It was AS&M.
I've seen countless people running all kinds of runners on their 3rd gens over the years. I'm fortunate enough to have a chasis dyno located mearly 5 minutes away from my home and over the years, I've seen countless TPI Fbody and Vette owners run their cars. Out of all the dyno's I've seen, the highest HP/Torque cars have ALWAYS been the ones using AS&M runners. ALWAYS! There's never once been an exception. Take any two cars that have the same or similar mods, the guy running AS&M's (or TPIS, since they're both the same thing) have ALWAYS made more HP and Torque than guy's running SLP's or any other runner. It never fails....
Another thing I've noticed is that most powerful TPI cars also use the TPIS "big mouth" base aswell. The two are an excellent combination and I've seen L98's put out numbers that the so called "experts" say couldn't be done with TPI.
(On a side note,I've only seen 3 cars run the Accel/Lingenfelter base and they put out some very impressive numbers aswell. Equal to anything I've seen from TPIS)
All the cars running SLP's, even the ones that were ported out to their very limits, have never impressed me. Even a set of extrude honed SLP runner still won't flow aswell as an out of the box set of AS&M's. I've seen it too many times IN PERSON to belive anybody that tries to tell me otherwise.
Obviously, everybody is going to have their own opinion, and after seeing more cars than I care to remember, dyno throughout the years, I've come to this conclusion. SLP's simply do not provide anywhere near the performance of any other runner on the market and that includes Edelbrock. They're the bottom of the barrel sort of speak. Sorry, but it's true. There's a reason why the SLP's are the cheapest. and on the other side of the coin, there's a reason the AS&M's are the most expensive
Having said that, as I mentioned earlier, the 25hp 30lbs claims were not made by me. They were made by AS&M. Unfortunately, despite all the dyno's I've witnessed over the years, I've yet to see a 100% bone stock L98 with nothing more than just AS&M runners run on a dyno, so unfortunately,I can't verify if the cliaims of 25/30 are exactly accurate. Maybe. Maybe not.
We'll see what they're really worth soon enough when I put them on my car but I can tell you right now, beyond a shadow of a doubt, my L98 will put out bigger numbers with these runners, than any other similarily modded L98 would/could/has with SLP or any other runner out there. I promise you that.
The AS&M runners should arrive in a week or two. I also ordered the Lingenfelter base to go along with it. . I will guarentee you right now, I'll pict up 35-40hp MINIMUM with these two mods. Mark my words.
A bunch of us got together for a "dyno-day" on another Fbody forum I'm on and with nothing more than an exhaust upgrade and roller-rockers, my IROC put out 212hp and 290 torque at the wheels. Not too shabby I must say

(The exhaust isn't even a full 3" exhaust either I might add, and I'm still running a cat too)
We're trying to get another dyno day happening before the end of the month so my runners and base will be on the motor by then for sure. I have no intentions of buying an AFPR, nor will I be porting the base or the runners. They will be bolted on "out-of-the-box"
Mark my words, 35-40hp MINIMUM with just those two mods.
Stay tuned, pic's, numbers and dynosheets to come, in the next few weeks

This should be interesting....