I have just finished my powerdyne 6.5 kit for my car and I was wondering if anyone has any dyno numbers that might be close to what I might have, or what you think i'll produce. The only other mods I have are a loudmouth exhaust, and two stage colder plugs. Also what might my stock dyno numbers be. My car is a 1997 30th ANN SS six speed. Thanks for the info, and any other tips I that might be helpful would be aprreciated.

 

I would guess about 240 to 250 rwhp stock and with the 6.5 psi kit 340 to 350 rwhp Did you do the larger air filter upgrade and soild intake tube that might be good for another 10 rwhp ....hope this help's i can tell you i made a disapointing 315 rwhp with a 4.5 psi powerdyne but my car had some issues They are all be corrected as we speak i also updated it to a 6.5 psi kit plus with alot of extra's so i'll let you what it dyno's when i get it back..good luck

 

If you don't have headers you need them now as they are probably worth about 50rwhp on your car.

 

I dont think they will be worth 50 rwhp IMO, if thats true then i should be making over 400 rwhp when they are finished with my car.I made 315 rwhp stock lt1 with just a 4.5 psi kit and weak valve springs and 9 degrees of false knock.So if that is true with headers,6.5psi kit,P/P heads off road pipe custom tunning i should be more then 400 all together i dont know about that correct me if i wrong PLEASE

 

For comparisons sake, my buddy with a 94 z made 310rwhp and 340rwtq with only LT's and a CAI. Exhaust is a major restriction on an LT1 and since a blower depends greatly on exhaust flow it will be essential that he have headers.

 

I dont doudt that at all.My question is if I made 315 rwhp with a stock lt1 with just my powerdyne 4.5 psi kit and the small stuff i have in my sig, then your saying i would gain 50 rwhp with headers/and off road pipe? If that is true ok what should i be making with P/P heads headers off road pipe 6.5 psi kit and a complete dyno tune ....Plus you have to remember that my car wasnt running right the first time on the dyno it had issue's that are be correted as we speak

 

Kinda of odd that you are doing heads without a cam. I would atleast put some rr's on the car. I would think you should be making ATLEAST 400rwhp.

 

Funny that you say CAM i wanted to do a cam but the person doing my car has it since AUG and i dont even want to think how long it would be there for that too.I did want RR's, i might put them on myself when it comes back maybe depends on what kind of RWHP i get He told me that RR'S might effect something with the boost didnt understand that but he builds some of the fastest ls1's and lt1's on the east coast so i guess i have to trust him

 

My '97 SS put down 263 rwhp and 294 rwtq this was in stock form. This is where you started but I don't know where you are at. Matt

 

I find it hard to believe that a stock LT1 with nothing more than long tubes and a cold air kit is making 310rwhp. Stock LT1's dyno ay around 230-240rwhp. last I checked, those 2 mods were'nt worth 70-8-rwhp! Back to the question, they say that nonintercooled boost is worth about 12-15hp on a stock LT1. I had a powerdyne kit on a 94Z228 with every bolt on and ran 12.72@110. I also put an 8# pulley on with a boost retard.I'm guessing with a stock Z28 and a 6# kit, about 330-340 at the wheels. I've seen alot of these powerdyne kits dyno very close to that.

 

12.7@110? Your car was a turd! And yes my friend dyno'd 310rwhp with those 2 mods. Look at the dyno numbers in my sig. How did i gain 60-70rwhp with those 3 mods. A stock 6spd lt1 making under 250rwhp is in poor running condition. It is very easy to trap 106-108 mph with a bolton 6spd. To only go 110 with 8# of boost on top of that is horrific. I trap 112 and i have a few basic mods. CAI, headers, rr's, and a cam with mail order tuning and i live in freaking AZ.

 

First of all, 12.70's is not horrific when the car had almost 100,000miles on the clock. The traps were a little bit low because of 4.10 gears with an auto. I've been modifying LT1's for years. This is not something new to me. I don't know where you get the idea that stock LT1's are junk if they are not over 250 at the rear wheels. You need to do a little research on your cars before you try to make someone else look like an ***. 97's will dyno 10-15hp higher than 93-96. The factory also rates them @ 285 instead of 275. Ive seen many base LT1 dyno numbers no higher than 240. If you're getting 70-80rwhp out of 2 bolt ons, I would be extremely suprised. I also don't know how you can say that high 12's are horrific when your car runs low 13's. Think before you speak!

 

I am going by horsepower not ET's. Also you should look at the milage of my car which you can see in my sig. I have 150k on my car and it used to have a 150 shot and slicks on it. Right now i have my rev limiter at 6800 and i rape the car daily.And yes my car runs low 13's but that is only because i can't get traction. I ran 13.3's at around 107mph before i put the cam in my car and that was with crappy traction! And if we compare, the only thing different from your was that you didn't have a cam but had a blower with 8# and i have a cam with no blower. BUT you I still out trapped you by 2mph which is what is more important to me anyways. As I was saying an LT1 6spd should not dyno under 250rwhp stock. If it does it is not in very good running condition. One of my buddies just dynoed his 94Z 6spd and got 274rwhp with a cai. Btw, my buddy that dyno'd 310rwhp trapped 107mph easily which is almost as fast as your bolt on blower car :P

 

I can see there is no sense in arguing with you. If you ever decide to race you car, ET's win not mph. I'm sorry you are a little confused about things. Do some research and find me posting some other day.

 

Yes, the car in question did dyno 310rwhp with LTs and a CAI. Most stock 6-speed LT1 cars will roll 245-265 rwhp...most in the 250ish range. 230-240 rwhp sounds more like automatic car numbers. Bolt-on LT1s rolling 300+ rwhp is not uncommon.

I can see being content with a bone stock LT1 car + a 6# kit trapping ~ 110 mph...but I'd be pissed if I had a full bolt-on + blower car trapping 110...but thats just me. I'd expect to be trapping 115-117 w/bolt-ons and a 6# blower. Did you trap that 110 on 8#?

When Mike said headers/CAI are worth 50rwhp, I'm sure he is referring to long tubes.