is this possible?

[tccrab]

Keith:

411 at the rear wheels?
Intake has never been off?



Could be done with Nitrous... but not for long!


TomC
'90ZR1 #792

[GrayZ]

Originally Posted by tccrab

Keith:

411 at the rear wheels?
Intake has never been off?



Could be done with Nitrous... but not for long!


TomC
'90ZR1 #792

that's what i thought..Tom...but...the guy does have 2 zr1's
i am waiting for his reply to my post...i asked him..
if no headers...and no porting...what did you do??
i all ears...

[GrayZ]

Originally Posted by tccrab

Keith:

411 at the rear wheels?
Intake has never been off?



Could be done with Nitrous... but not for long!


TomC
'90ZR1 #792

tom...here was the mr. numbers reply....he makes sense..but..of course..
i'm not much of a tech...

112733.12 Misfit Money
[ Donate ]

Imprisonments : 3
Posted: 4 Post subject: itlgo2 wrote:</SPAN>8388 wrote:I own two ZR-1's and you probably won't like what I have to say, but I would do only bolt ons. The LT-5 is a bit too complicated for internal mods, in my opinion. With the right bolt ons you can make 400+ to the rear wheels. My 93 makes 411 rwhp and the intake has never been off, and it does that without aftermarket headers too. In my opinion it's best to achieve the 500+ hp in a regular C4. It's cheaper, and easier to work on, and when it's time to sell, it's easier to sell a modded regular C4 over a ZR-1.

really....?? 411 rwhp ..and you havn't ported...or added headers?
so ...i'm all ears...what DID you do?


It has a Desert development 3" exhaust (they don't make these anymore) but it would not be hard to duplicate. They used a unique X crossover that in my opinion really helps. I also have a Doug Rippie chip. The 411 was done thru cats, although I no longer have cats, the car does feel a bit stronger, but I have not redynoed it since the cat removal.

In my opinion, is has all to do with having the cams timed correctly. There exist a large varience of power between most ZR-1's and that's because these engines were all hand assembled, thus cam timing varies from one to another. Most won't tell you that, because they are clueless, but those are the facts.

The LT-5 as you know, is a very hard working and dependable engine. Probably the most dependable engine out there. But once you start modding it's internals all of that changes. No difference than modding up any other engine on the planet, the only difference is that the LT-5 is a bit more complicated and more expensive to fix. For me, if you need to have 500, 600 700 + hp, it's best to do it with something that is easy and cheap to work on. The old small blocks or even the new LS engines are cheap and easy to work on, and make good power.

[jonszr1]

I know randy woods dynod 390 at the wheels but that was with headers. Has he owned it since new? Could the previous owner done head and or/plenum work? I finally got mine to 410 rwhp but that took plenum and injector porting and headers with a custom chassis dyno tune. Corey Henderson said that my hp numbers were the highest he has ever got from a car that had these mods. what type of dyno? could he post the dyno sheet. there is a way by cking the sheet to see if the operator has messed with the settings to inflate the numbers. I amnot saying bs but that is 40 hp higher than any other car tested with the same set up. has he ever run @ a drag strip and coulde he post times and mph . maybe we should start a thread to see what others with the same mods have gotten. if true he has one rare freek that people would pay well for just to tear down to see how it was achieved.

[jonszr1]

peav,, your right on the cam timing. just got off the ph with corey and the very max in hp is 14. this info is from what corey has personally done also there is a piece in the heart of the beast on the hp diff. i wonder if he will take me up on my dyno offer @ Coreys? we shall see. I know I was asked to prove mine after porting which I did. if this is true its a alien car

[Peaven]

Originally Posted by jonszr1

peav,, your right on the cam timing. just got off the ph with corey and the very max in hp is 14. this info is from what corey has personally done also there is a piece in the heart of the beast on the hp diff. i wonder if he will take me up on my dyno offer @ Coreys? we shall see. I know I was asked to prove mine after porting which I did. if this is true its a alien car

Thanx Jon that's what I figured....if anyone would know, Corey would. That said, there are some freak cars running around out there and who knows, maybe this guy has one of them. I've lived long enough to see that just about anything is possible.

[Peaven]

Originally Posted by ITLGO2

8388 wrote:In my opinion, is has all to do with having the cams timed correctly.

I would agree with most of what the guy said, but....I didn't think that there could be that much varience in hp from just cam timing. I still don't. I could see 10 rwhp variences between a poorly and perfectly timed LT5, but he's claiming way more than that. Anyone care to `splain it to this noob?