Low #'s PRC 5.3 2.5,ms3, help?
Low #'s PRC 5.3 2.5,ms3, help? Mods in sig... I got my car dynoed and i put down 409rwhp and 367rwtq from what i've seen that seems low. Since the dyno i put a borla adjustible,cutout, I plan on getting a underdrive pulley soon and a bigger maf and lid. Is there anything you guys think that might be restricting some hp, I would like some help. Thanks
Yep, seems low but I also wouldnt be too concerned if it runs good. Try to get a time out of it and look at your trap speed. Im not a fan of the MS3 but thats just me. My close friend only made 36Xrwhp with one (I installed everything) with the same mods except for his stock heads but he did have an UD pulley. I would grab an 85mm lid, better maf and HS/YT rockers and try to get the FAST ported at this point.
TECH Apprentice
Joined: Aug 2007
Posts: 317
Likes: 0
From: Mississippi
That doesn't look right to me. You should have numbers like mine. FWIW, I'm running stock sized SLP lid and stock MAF. According to Futral, don't waste your money on the larger MAF until well over 500whp. They didn't seem to restrict my setup.
TECH Apprentice
Joined: Aug 2007
Posts: 317
Likes: 0
From: Mississippi
He's not missing anything. He's running a 90mm tb. The lid and maf are fine. Maybe a pulley, but he should still be higher.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo TECH Apprentice
Joined: Aug 2007
Posts: 317
Likes: 0
From: Mississippi
Wonders for his wallet, maybe. He already has a proven combo, usually worth ~450rwhp. I don't think he needs injectors or fuel pump either. I'm running stock pump and really didn't even need these 42lber's. They're running at 55% at WOT. Something's not right and it ain't his choice in products. Maybe in the tune...
Well as mentioned it's definitely low. Was that a DJ or a mustang dyno? With stock heads 90/90 and a 233/239 TSP cam I put down 427 RWHP/380 RWTQ in my Trans Am. You've got a 450RWHP combo so something's definitely screwy.
I put down 417 with stock intake, and the guy who tuned it said my stock injectors were running at 113%. Still shouldnt affect your over all numbers. But something sounds wrong there. With that setup should be in the 420-450 range I would think.
I wouldn't have expected a LOT more than that, maybe 20-30hp more.. but they are budget heads. I know I'll take some crap for saying that, and probably this, but every mod you have listed is a budget part. I'm all for saving money but you can't eat caviar at long john silver prices.
What I would do first is get a scanner on it, read the A/F, fuel pressure, make sure the maintenence is up to par, and the sensors are good, fuel filter is good.. etc. Uncapped exhaust could be worth 15 depending on what you are running, U/D could be worth 4-5.. there's some power there to be had, and I hope you find it.
Of course you could always find a friendlier dyno or just take it to the track.. I see a lot of high HP claims without any track times to back them up.
What I would do first is get a scanner on it, read the A/F, fuel pressure, make sure the maintenence is up to par, and the sensors are good, fuel filter is good.. etc. Uncapped exhaust could be worth 15 depending on what you are running, U/D could be worth 4-5.. there's some power there to be had, and I hope you find it.
Of course you could always find a friendlier dyno or just take it to the track.. I see a lot of high HP claims without any track times to back them up.
Thanks for all the responses. I plan on going with some bigger headers probably KOOKS, and all the other little things I need but i've seen this combo 440rwhp no problem I just think something is missing.... It runs great, the rev limiter is set at 6500 and i think it could be revved out a lot more considering my peak was at 6400. I will try an get my dyno graph up some how. Keep the advice coming, Thanks
On a side note.... If any of you have any suggestions on a more street friendly cam that puts out some good numbers, I maybe in the for a new cam so any advice is good.
2.5" piping to a blowmaster definitely isn't ideal for a h/c car. I would think you're down at least 15RWHP compared with an open cutout. Combine that with at least 5 from an UD pulley and you're closer to 430 RWHP. I still think it's a hair low for a h/c/90/90 setup but at least you would be much closer. I would expect closer to 450RWHP out of this combo.