Still doing research as i finish posting this

Planning on buying bolt ons (Budget )

1993 C4 LT1 Auto 83k Miles

-Headers (Not longtubes, Been researching and herd negative and positive opinions about them. Like doesnt really increase power that much)

-Intake (Lid cut w/oem filter, Or SLP 3 cone setup)

-Rear End (Whats the best for DD and Gas Mileage, But good track times)

-Cams (Mainly confused on cams Mainly going to run bolt ons, planning on doing pushrods, whichs ones? and 1.6 lifers whats that, all ive been seeing on threads lol) So whats a good combo on stock bottom end. DD and Gas mileage but good track times.

-Converter Stall (What brand, 2800rpm ?)

-Exhaust setup ( Middle resonator/ or Muffler. Replace with x pipe on stock muffler )

-Injectors ( Bosch III? )

My main goal is to try to hit 12's My current time is 13.8 consistent completely stock.

Only things ive done so far:

New Cap and Rotor
Acdelco Plugs
Taylor Wires
Fuel Injection Cleaner

Havent ran it yet but dought theirs a difference

Only problems im having are from reverse to drive or drive to reverse, it makes a snap crackle and pop noise. Probably more ujoints needs to be replaced lol.

 

Anyone?

 

I would go with a converter, 3.73 gears and drag radials. That should drop your ET a lot.

 

on the 1988:
Only long tube headers are worth fooling with. No shortys
delete front cats if you can.
install high flow main cat.
cut air filter lid and get new stock filter.
remove frisbee
install March Power & Amp aluminum pulley set.
install 1.6 full RR's (SA type)
install LT4 springs (101#)

 

damn didnt think anyone would help lol. i have a 93 would it make a difference to the 88? its a different all i knoe. also whats 1.6 rr i see it everywere on post.

For exhaust mod i was going to take the middle muffler or resistor and replace it with a x pipe and keepin stock mufflers

 

 

You're working on a 93 right?

Longtubes are a good start. Not sure where you are reading that longtubes are not a good mod, but that's a great place to start.

A cam sounds like it's probably beyond your skill level at this point.

1.6 roller rockers (not lifters) are a good mod as well.

For you, if you plan to do the work yourself, I would start with the rockers. That's a pretty basic mod, fairly simple to install, and should yield a legit gain.

Tires are another great way to reduce ET. Some drag radials will help.

Another thing you need to figure out is how you are going to tune the computer for the mods. If you plan to do it yourself, the learning curve is pretty steep and you have a couple hundred dollars of tuning gear to buy. If you plan to have it done mail order, do some research on who you want to use. The best way to do it, in my opinion, is to have a local tuner do it on dyno. Continue to use that guy/shop (once you find someone you like) because they will be familiar with the car, know what they've already done to the tune, etc...

You can probably do the rockers and maybe the headers without touching the computer, but in order to see the full potential of any mod you'll need to custom tune the PCM.

 

good stuff. goin from hondas to this... big difference. its currently my dd but untill i get the honda up and running. im going to start pulling parts stuff off. i think im better off with a zex kit, n tires. hit my 12s lol jk not giving up yet.

think im going to go with:
middle muffler removed and replaced with x pipe.
cut intake box.
order 3.73 gears. (from were?)
1.6 rockers (replace pushrods?)
lt4 springs

sounds good so far?

 

Don't know where you heard longtubes are not worth it. They are. Unless you are pushing them into 1" exhaust pipes, then probably not.

 

long tubes to a x pipe? ya?

 

Longtubes to an X-pipe is a good combination.

 

Hopefully i find long tubes on the fs section. any good reviews on these?

http://www.summitracing.com/parts/HOK-2151HKR/

And for the 1.6 rockers. these are fine

http://www.jegs.com/i/Comp+Cams/249/1418-16/10002/-1

compared to these

http://www.jegs.com/i/Comp+Cams/249/1018-16/10002/-1

For valve springs: going with stock lt4s?

Cam: Stock LT4?

Shift Kit?

I cant find the torque converter and 3.73 gear

 

Phoenix Transmissions for the converter.

http://www.phoenixtrans.com/html/converters.html

 

sorry guy been busy with work. but what i listed sounds good?

 

I don't believe the 2151's will bolt to the LT1 heads. The 2151's are what I have on my L98 car and I seem to remember the L98 and LTX cars having slightly different bolt patterns for the headers. Maybe I'm wrong though, I'm sure someone with absolute knowledge (as opposed to my fuzzy memory trying to guess) will chime in eventually. I would prowl the classifieds here for a set of LTX longtubes. If you are going to buy new, Exotic Muscle makes a really nice set.

Either set of rockers you've linked to will work. The cheaper narrow body ones will be fine. I've never ran that particular rocker under a Corvette valve cover, so you might end up getting LTX Camaro valve covers, or cutting up the inside of the vette valve covers for clearance.

LT4 valve springs are alright, and would be a good mod to do with the 1.6 rockers. They are only spec'd to handle a .525 lift, so depending on your cam choice they may not work for you. Some guys go over the max lift spec without issue, but I wouldn't do that.

I like the LT4 hotcam as opposed to the stock LT4 cam. It will work well with the 1.6 rockers and LT4 springs. GMPP makes a kit that comes with the cam, springs, rockers, retainers, etc...

A cam, especially on an LTX car, is an ambitious undertaking for anyone, let alone someone whose never been into a V8 before. Be sure you're up to it before tearing it down.

The gears in the D36... I have a D44, so I can't help you out much there. www.tomsdifferentials.com is where I got my stuff. They were great.

My car is a 6 speed, so I'm no help on the converter.

Good luck man.

 

I probably shouldn't say anything (cause I haven't tried it), but I've seen more than one member interchange LTx and L98 headers. **** The bolt spacing is the same. I think the LTx bolt holes are just slightly below the centerline of the exhaust ports. L98's are centered up/down with the exh ports.

That said, the link provided by the OP shows the 2151's as working thru 96 cars. But, interesting, they show incompatibility with AFR angle-plug heads! Hmmmmmmm.......

Even though the Hookers are considered "tuned", they're thinner and might not be as good of a choice as the EM headers Neat mentioned. In fact, EM's would be my first choice for this situation.

****Note: The one thing I wouldn't try w/o confirming is to put 1 5/8" L98 headers on an LTx car. The interchangability I've seen has all been with 1 3/4" models.

 

I did some Hedman Headers awhile ago on an LT4 that was swapped into an 88 Monte Carlo. Hedman sends a 1/4 inch thick steel plate that adapts the older bolt pattern on the headers to the LT4 pattern. That's why I don't think they will interchange.

I'm sure a phone call to hooker/hedman will answer the issue.

 

so im going to order 1.6 rr soon. lt4 stock valvesprings. lt4 hotcam. long tubes. and slp intake. does it need a tune? also the lt4 intake manifold conversion worth it?

 

I have Hooker headers on my 86 and they are great. And for the stall/torque converter I went with a Neil Chance converter and it takes alot of abuse from my 383.

 

The LT4 intake won't work on non-LT4 heads. The ports in a slightly different position.

I guess I shouldn't say it won't work, because the car would probably start and drive without a problem, but it will hurt performance because the ports won't align.