Denny McLain

I normally don’t post dyno sheets anymore and I’m getting ready to completely change my combo, but I thought I would as I consider the results particularly good for a set of LT1 heads with 2.0 valves and what I consider a rather mile cam (GTP 6 on a 114)

The runs below was from Saturday and we changed 20/50 oil to 5/30, new 02 sensors and spent more time tuning it above 5500 rpm. As you can see it revs very clean and still makes 400 rwhp all the way to 6800 rpm.

No dyno tricks, no icing of the intake and SAE Corrected. The actual was higher.

445.19 rwhp and 419.10 torque.

Denny McLain

Sorry guys..... I thought the dyno sheet was embedded. Guess you'll just have to take my word for it. I forwarded a sheet to Lloyd so he would have a copy and I'm sure you can get it from him.

LT4POWR

, nothing wrong w/ those #s. What are you expecting with the new setup?

Denny McLain

Almost hate to guess, as those are better than I expected. Hoping the new combo is in the 470 range with a hydraulic cam. If not I just spent a ton of money for nothing.

Injuneer

Might want to mention what sort of drivetrain you're running, so people can at least speculate on the flywheel HP.

BUBBA

Drive train, my A$$, I want to know how you get 445 RWHP out of that setup NA.

DavesLT1

no kidding.

how did you get 385? bigger bore than a 383, which is .030 over isn't it?

96speed

3.75 stroke with a 4.040 bore.

Nice numbers Denny M.
Ryan

97 RedSS

Very nice numbers!

What were the #'s before tuning if you dont mind telling?
Also, why the switch from 20/50 to 5/30 oil?

Cody

Antz97ZNJ

If I rememeber correctly Johnny Hutchkin from gmhtp has/had a blue 385 LT1

tireburnin

I'm not calling BS, but how is it that your car dyno's 40rwhp more than almost every other car with similar or the same mods? Just curious how it can throw down numbers like that (and even higher uncorrected)? Did you ever have it at the track? What did you trap?

Denny McLain

Injuneer....We can do that.

It's a 96 Collectors Edition Vette 6 speed with 4.10 Viper gears, long tubes, a very good hand built dual 3" exhaust, ported LT4 intake, 58 mmtb, 30 lb injectors, GTP 6 cam on a 114, electric water pump, 11.9 to 1 compression, etc. etc. To get a 385 all you do is a .040 bore instead of a .030.

The reason I changed from 20/50 oil is because racing season is coming up here in Dallas and you pick up a little power from thinner 5/30 oil if your clearances allow for adequate oil pressure. Not much, but when you do a racing tune, you get all you can get. We had a fresh set of plugs all set to put in as you briefly do pick up a little power from fresh plugs but decided to install them in liu of just before we race it.

With a little more playing I can probably get it to 450 rwhp but it’s a lot of messing with it for a little.

All I did was put the combo together, tune it and drive it so you have to give most of the credit to Lloyd who did the heads and intake.

Thanks for the positive reply's guys but I felt sometimes Lloyd work may not be fully appreciated as a lot of people who buy his stuff don’t go that extra and do the fine tuning.

Denny McLain

Don't mind at all. 431 rwhp and 416 torque. It was on the dyno sheet I couldn't embed. Again, the oil was for a 3hp gain and that's it.

There is a bit more to the story as for some reason the rings took forever to seat and it was only making 414 rwhp earlier and wouldn't respond to tuning.
Now that the rings are seated I can do my thing and get the most out of it.

Denny McLain

Damn...... you guys are tuff crowd. To be candid, the car made about 15 more hp than I expected also so blame it on the stars being aligned just right.

Tried to embed the dyno sheet but it wouldn’t let me do it but quite a few people know me on this list and know I really don’t need to make things up. I was one of the first people in this area to run 10's and I’ve been sponsored/subsidized as a driver so I’ve been able to pick up a few inside tricks that help.

Wasn’t kidding in some earlier posts when I said I was on my 13th LTx cam. Think Lloyd will more than validate my attention to details. Also I’m not the first person to make those kind of numbers as others did the same or better years ago.

Just got it final tuned this morning so no track times and probably won’t have any either. BTW…. It only took me six months to get all the bugs worked out. My new Trick Flow heads will be done the end of this week and that’s my next project but I don’t believe in making any changes until you’ve got all bugs ironed out on your current combo.

Once I get the new heads ironed out it’s time to put in the new cam, crank and pistons sitting in my garage. Remember… only one at a time.

tireburnin

I didn't mean it in a bad way...those numbers are just exceptionally high for the mods involved. I wasn't saying it did or didn't make those numbers.

Regardless...congrats on the badass car and numbers as it sounds like you have everything setup perfect. Always good to see someone make power.