ok now i'm sure this has been asked but i want specif opinoins on my situation and budget....now look at my sig and thoise are my mods now i planned on buying lucas 42lb injectors for like 200..if anyone know of somewhere i can get them cheaper please let me know...and then i was going to put them in myself take it to world motorsports for a dyno tune for 125$ an hour....is this a good idea would i benifit more from this then a gm stage kit right away. i can always change the pulley and get retuned. and how long does a tune usally take. thanks guys for your input

 

i will have my 42's out of my car in the next few weeks....i had them in the car for about 8000 miles, but i just got my 60's and getting tuned soon.

 

nice how much would you want for them

 

If you just want the GM stage tune PM me so I can send it to your email. If you're not swapping pulleys then all you are basically going to do is change the fuel tables and call it a day. Takes like 5 minutes basically.

 

if you put the 42's in your car it won't start until it gets tuned
just put them in while at the shop

 

?!?

Quite a few people have chosen to install stage 2 by themselves then drive to the dealer for the reflash. How did they do that without their car starting?

 

my bad

you're right

that's just what i was told a minute ago

 

Sure they do.......LOL, they just run like hell!

 

as far as i was told if i stay under 3 k with the new injectors in i'll be fine. but yea i'm not changing the pulley just yet but with 42s and a custom tune i'm looking atn like gm stage 2 power with stock pulley right? i'm pretty sure someone on this sight got a stock pulley to run 13.6 with a cutom tune which is amazing

and tghere gonnna be lucas injectors...why? 150 for a set of four..so 150 + 125 an hour=375..cheaper then a gm stage kit...un;ess it tkaes longer then an hour i don't see why it would tho..but then i get t custom tune out of it and some extra power over a gm stage 1 or 2.

and please if you don't know what your tlakinf about don't leasve an opion i know for a fact the car will start if you have any background in cars you would know that i just don't want to be led in the wrong direction.on a budget remember

 

That 13.6 was with a custom tune and LOTS of cooling mods. Pretty sure he had a dual pass end plate on the after cooler, a bigger heat exchanger, and maybe meth. And drag radials...

If I were you I'd post up in the regional forum and see if anybody's near you with HPTuners and experience tuning. Then I'd go with a 3" pulley and the 42.5lb injectors. That's close enough to the stock pulley size that you're not adding too much drag when you're just cruising around and you're not beating up your engine, but you'll get an extra couple pounds boost.

 

You will not make the power of a GM stage 2 kit. You will gain ZERO torque, even though you will pick up some HP.

 

FACT for newbs: HP = TQ x RPM / 5252

Torque and HP are directly related at any RPM.

Can you expain that baseless statement?

 

and why would he need some many cooling mods if hes still boosting stock levels please people if you don't know don't type

does not make any sse if he's not running a smaller pulley.. plus a i have a h/e and i'm talking about a custom tune---hence a dyno tune

i'm talking about a custom tune on 42's with stock pulley for now.

 

cooling mods help regardless of how much boost or how small the pulley.
colder air = better performance. period.

 

yea but it only does so much and i think on a stock pulley my after market h/e with do the job

 

you are good on cooling for now. but it appears that you were asking if you would gain more from just injectors and a tune than a stage kit... to which the answer is no.

if you already have a h/e, and you are getting 42# injectors and dyno tune anyways, why not spend the extra $100 and get a modular pulley? you will gain alot more.
the 2 people who hit 13.xx with the stock pulley have killer tunes, rev past 7k, alot of cooling mods, traction mods, intake, exhaust, etc. alot more than just a heat exchanger, injectors, and basic tune.

gm stage 2 IS a waste of money. the tune is garbage.

 

Don't try to call somebody out if you have NO IDEA what you're talking about. Cooling mods provide rather significant gains even on the stock pulley size. Maybe it won't seem very significant on a dyno pull, but you won't heatsoak nearly as fast, meaning you keep the power you have, it doesn't fall on it's face after it gets hot.


There's so many people spouting bullshit on this site that it's downright ridiculous. Know your **** before you try to correct people, especially when those people are answering YOUR questions.

 

Because by the time you start making power with 42# injectors (after 6500 rpms) you are already beyond your torque curve and therefore don't gain any additional peak torque.

BennyHHR, I really don't like the way you talk towards me.

 

so if thats the case then why would you even need cooling mods.and then why does a gm stage 1 state that it gives you 30bhp and with a pulley yuou only gain 15 hp and another 5 to 10 tourqe...and i know a smaller pulley would work better but let me put it this way i have 300 dollars....and does anyone know how long a tune should take

 

The stage 1 kit DOES give you power. But It gives you NO additional power below the stock redline. All of the power you gain is a result of being able to rev to 7,000 rpms and utilizing the power in those extra 500rpms. Your power curve will look identical up to that point. You don't gain any bottow end power. It's still a great modification and definitely the first place to start. Because you should not increase boost on that car without adding the support for the fuel.

The power you gain from the pulley is across the ENTIRE power band, not just a peak number. It is more usable, and more beneficial. Having a fatter power curve is more desireable than having just a higher peak number. The pulley adds more torque, and as a result you gain hp. The additional 2.5lbs of boost is beneficial.

Dyno tunes take experienced tuners ~1 hour to be fair. There is no estimate for how long it could take a tuner to tune a type of car they have never worked with before. For example: My first experience with my Mustang took me 4 hours to learn it all and be happy. It takes me 30-60 minutes to tune a cobalt.

 

i see thank you i think i'll get the lucas 42 and a 2.9???or no? from smoothflow pulleys for 1oo bucks and a gm stage belt...other then that what would be good for the 42 on a dyno tune i hear that the 2.9 may be too small for the 42 at least on the gm tune but what about on the dyno.and what about just keeping the rev limiter at 6500 would this be benificial to get the most out of that pulley size or should i stick to the 3"

 

If you are using the Lucas injectors you should be fine. I see the GM injectors as the weak link in the 42# vs 2.X" pulley debates. All you need is the Stage 2 belt to go with that, correct. The pulleys are quite hard to install, so look into how you plan on removing the stock pulley and putting the new hub on. I wouldn't keep the rev limiter at 6500, you can raise it to 7000, Since peak power is roughly going to be around 6750 rpms, shift just before the redline, and fuel should be fine. It is pushing it a little, but nothing rediculous. You can always stick with the 3" for now, and then change out to a 2.9" later on but the difference won't be drastic between the two, mainly a matter of how fast you build boost, not how much boost you make. That eaton loses efficiency around the 3" pulley, so anything else after that makes it build boost faster, but it gets harder and harder to build more and more boost out of it.

Since you are used to a stock car at the moment, the 3" pulley will give you PLENTY of thrill, along with the 7,000 rpms redline.