is this possible?

[91King]

Originally Posted by ITLGO2

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".

I posted on another forum i belong to. dometicmisfits.net
the above mentioned quote..was from a guy we call numbers guy,
he seems very knowlegable about cars...and owns quite a few it seems..but...when i posted the question to the forum there..about some upcoming mods..i have been thinking about...he anwsered with the above quote...my question is

Is this possible?? with just bolt on's? cause i have headers...and corsa exhaust..and i only have 353 rwhp...before the corsa.
when i dyno'd in may...i was wondering...whatcha think?

When I purchased my car in April 2003 topend port work had already been done and it had SW headers/no cats going through a stock exhaust. The car dynoed 377 at the wheels with this set up. Two years ago I added a B&B exhaust and RT cats. I did not dyno the car after adding the exhaust but seat of the pants feel was that it had more power. The car is currently at EES getting upgraded to a 402.

Clearly, 8388's car possesses the most RWHP for a stock set up most of us have heard of. That said, for the vast majority of our cars the only way to get near 400 RWHP is to add a ported topend to headers and exhuast, and to get substantially over that figure you're going to have to port/polish the heads as well.

As far as the LT5 being too complicated for internal mods, I disagree. To be sure, you can't run down to the local speed shop and get the car fitted with off the shelf turbos and superchargers, but there are a few very good tuners who can put some serious bite in the beast if you choose to go that route. And even though one can certainly obtain 500 RWHP for much less on an LSX engine, those engines are simply nowhere near as exotic as the LT5 and in my opinion lack a level of "sex appeal".

[GrayZ]

holy crap...ok...sam..numbers guy...is a good dude...and i'm sorry
I even started this post...i did not intend for it to become a pissing
contest...we all know that different dyno's put out different numbers,
for the same car...if Sam, says he turned...119 mph through the 1/4 mile
that right there tells me...something is different about his car..
if he had dyno figures...i'm sure he would post them...let's all take a
deep breath..here...after all...we are brothers of the beast.....right??

[jonszr1]

thats exactly what i am trying to say he fired the first one and all I asked was a simple request then he comes back with this bs last post like a smart mouth. I am sorry but I don't back down from a smart mouth. I ain't built that way. I guess it come from my years a a ranger. But good guys bdon't post smart mouth sh*t like that. i can remember the grief I got for my numbers I backed them up . that was all I was asking until the little smart mouth posted what he did .I am outa hear .This isn't fun any more

[Pete]

I believe he could be making the power.
Cam timing is worth a bunch.
Most think inside the box,with the LT5 you have to think outside the box.

Most assume there's only 5-10hp to be had from cam timing to my suprise there is 20-30RWHP just from cam timing.

Don't critisize someone,especially when you don't know yourself.

8388 love to get my hands on your heads/intake and port them,you could probably make another 60+RWHP you would have the baddest 350ci ZR1.

[jonszr1]

n o one started by criticising just wanting to see the docs on it. I do now alittle about this motor and the effects of cam timing best i have seen . is 14 hp. but 411 with no headers andno porting =-NO way.I know he has a dyno sheet if its true so why not share. whats wrong with that ??????????

[Aurora40]

Originally Posted by Pete

Most assume there's only 5-10hp to be had from cam timing to my suprise there is 20-30RWHP just from cam timing.

What exactly is involved in doing this? I.e. where are the variables to be aware of when installing or timing the cams? And do you have any suggestions as to when it might be appropriate to try and when it might not be worth cracking the motor?

In regards to your initial statement Sam (or the one Keith initially posted from you), it does seem a little bit backwards. You are saying the engine is too complicated to get into any internal stuff, that you suggest just sticking with the exhaust mods/bolt ons and leave it at that. But you are also saying cam timing is where the power difference comes from. I would think for most of us, it is a lot less complicated and there's less risk of messing something up in removing the plenum and IH's and having work done to it, than in removing the cam covers and messing around under there.

Most of us have to take the intake off now and then anyway just for maintenance of things like plug wires or fixing vacuum leaks and whatnot. But this cam timing thing is certainly intriguing.

[Pete]

Originally Posted by Aurora40

What exactly is involved in doing this? I.e. where are the variables to be aware of when installing or timing the cams? And do you have any suggestions as to when it might be appropriate to try and when it might not be worth cracking the motor?

First let me say that the MPH on 8388's car shows around 400RWHP +- dyno's are a tuning device some might show more some less.

Some later ZR1's make 350-360 RWHP stock with the right cam timing
add another 30RWHP and your close to the 400rwhp or 119mph.

My opinion,the best time to do the cam timing is,when you do heads and intake porting.

In the last few months i have reseached and tried different cam timing and to my suprise what the experts have been saying is all wrong the LT5 also suprised me how it doesn't react like a 2 valve motor with cam timing.
I'm still in the middle of trying different cam timing,i will have more input on this by next week.
I might have to retract about the bigger intake cams not making power,at this time the bigger intake cams seem to be worth about 25-30 RWHP.
Like i said i will have more info about the stock cams and bigger intake cams.

Todd Pepmeiyer(sp), DO NOT i repeat DO NOT install the big intake cams or for that fact stock cams at the specs you emailed me a while back the one Crower recommented unless your looking to loose power,i tried it.
I don't have your email i changed my PC since then.
Todd,e mail me.
Most think of the LT5 like a 2 valve motor in some ways it's right but at the most part it's wrong.

If i came on here posting that my 350ci LT5 makes 470-480rwhp or runs 125MPH would anybody believe me? NO,and i think we would have the same arguement.

My goal to be the first to run 10's N/A 350ci LT5 6spd,with A/C on
Peace
Pete

[jonszr1]

pete , maybe i can. clear this up a little . i just wanted to see the supporting dyno sheet so i could see where the extra power and tq was made. I went through the same thing not too long ago when I came back from Coreys' and reported 409.9 rwhp and 373.7 tq . Since I did not have the ability to scan my dyno sheet . mailed copyies to those that wanted them as welll as Coreys' ph . so people could see I was not blowing bs. we all would like to find the majic carrot for that 30 extra hp. I for one applaud your efforts to seek the 10s with a stk displacement lt5 . I know you would be proud to supply the supporting data thats part of the fun of seeking to do something that hasn't been done before . maybe I am alittle sensitive because of how i got raked over the coals with my numbers with my mods ( headers flowmaster ex portrd inj and plenum and new prom.) then someone claims to have this with a totally stk car cats and all. and making the same power as my car with mods . i thought i asked nicely just to see the dyno sheet for fun and the ensuing melee was sad . Bob hall allways said I was from the show me state . hope this helps you to see from my point of view for what its worth . id love to talk about some exhaust ideas I have . pm me if its ok to get ahold of you on this subject.

[8388]

Originally Posted by jonszr1

thats exactly what i am trying to say he fired the first one and all I asked was a simple request then he comes back with this bs last post like a smart mouth. I am sorry but I don't back down from a smart mouth. I ain't built that way. I guess it come from my years a a ranger. But good guys bdon't post smart mouth sh*t like that. i can remember the grief I got for my numbers I backed them up . that was all I was asking until the little smart mouth posted what he did .I am outa hear .This isn't fun any more

I wasn't going to respond to your childish remarks, but I think I owe it to the others reading this.
#1. I was only trying to give some advise, about the capabilities of the LT-5. You took it as if I was trying to brag about my car. And in reality, I could care less what you think.
#2. I've been saying for years that all LT-5 have the same capability, those that are willing to listen with an open mind, will eventually benefit.
#3.Those that know me, know of my car and it's power, I've got nothing to prove here. I was invited here thru an email.

http://home.comcast.net/~corvette.co...ome.html-.html

[Peaven]

Originally Posted by ITLGO2

i'm sorry
I even started this post

Troublemaker


Miscommunication aside, this has been an intriguing and informative thread. I'm no Smokey Yunick, but I'm all for finding more hp in my beast....and since I want to pull those pieces off to pc `em someday soon (if i can keep Blue) then i might as well get `em portnpolished while I'm at it. Any gains from cam timing would be icing on the cake.