Corvette Forum : DigitalCorvettes.com Corvette Forums banner

1 - 14 of 14 Posts

·
Registered
Joined
·
15 Posts
Discussion Starter #1
Hi Guys!

Is there anyone in the Seattle area that can help me make my 1995 LT1 A4 faster??

I have called numerous performance shops and have heard different things on what I can do to make my car faster...Some said headers, some say chip, some say gears...I dunno what to do!

It looks like my quest to get more power out of my LT1 is about over. I have about $1500 to work with and can't seem to figure out what's best, if anything at this point.

I have already done the following: Magnaflow Exhaust, Cut AirLid w/K&N, and coolant bi-pass.

I would like to do Roller Rockers next but have no clue on what to order and want it done right! Can someone point out what to order? Anyone interested in a side job? :smack

1995 LT1 A4 Coupe (Torch Red)
3.07 Performance Gearing
Magnaflow Mufflers
Cut Lid/W K&N Filter
Coolant Bi-pass
Air Foil-haha
IAT Relocate
 

·
Premium Member
Joined
·
5,157 Posts
In my opinion, you can either make the car faster by changing the rear gear, or you can continue to try to persuade more power out of the engine.

I'd personally go with the gears (3.73:1 if it was my money).

To really pull more power out of the engine will require much in the way of improving breathing (the K&N & cut lid combo may yield 5 HP - the airfoil just looks cool at this point of your mod journey).

If your budget is $!500, I'm not sure you have enough to do the breathing improvements right. You'd want to change the heads, cam, throttle body, possibly the injectors, and a whole host more, and that's going to chew up your budget realy quick.

Additionally, if you don't have the experience to do this kind of work, then you can figure it'll cost as much in labor (at least!) as it will in parts.

Good luck!

Steven
 

·
DC Crew
Joined
·
53,220 Posts
I thought by the thread title that viagra wasn't working out for you.

:laughing:

All joking aside ... $1500? ... about the only thing you can feel on a C4 with $1500 is nitrous.
 

·
Registered
Joined
·
37 Posts
i live in the seattle area .what ever you do don't go to rick starks in kirkland . they did some work on my vette i was refered to them they are a corvette specialist yeh right cost me 6300.00 for melrose headers, chip, new gears, and a new air system. they [email protected]#@!% up my exhaust had to have it redone. they suck.. anyhow there a place in everett that is putting a cam and having heads redone th whole top end i'll let you know how it goes.
 

·
Registered
Joined
·
441 Posts
Yea, unfortunately $1500 isn't gonna get you much in the corvette performance world........You could do a well set up nitrous kit with all the safety bells and whistles and a performance ignition(such as MSD or Mallory).....if that isn't your thing.......then like mentioned, going with 3.73 gears in an A4 car like yours will make a pretty good difference (for now).........then something like this when you get some more funds together...www.eportworks.com ... read info reguarding LT1 LE-2 package.....this is a VERY tried and true (and cost effective) set-up that's still plenty driveably for everyday use....most LT1/LT4 Vette's go right into the high 11's with the supporting mods and some drag radials ..........Joe:thumbsup:
 

·
Registered
Joined
·
9 Posts
3.07 gears are a good ratio for your Vette. 3.73s might slow down your 1/4 mile times and cost you gas mileage. I would invest in long tube headers. Make sure you get a good set of ceramic coated headers and check the emissions laws before you install them. Summit racing has them. I believe you already have 1.6 stamped rockers. Check that out. I know the 96 went to roller rockers. If you have 1.6 stamped you won't get an additional lift. I upgraded from 1.5 stamped rockers to 1.6 RRs but I have a 88. I use the Comp Pro Magnum RRs. I got an additional .030 lift and that gained about 15 HP. The best RRs in my opinion are these:

http://store.summitracing.com/partdetail.asp?part=CRN-10758-16&autoview=sku
 

·
Registered
Joined
·
441 Posts
3.07 gears are a good ratio for your Vette. 3.73s might slow down your 1/4 mile times and cost you gas mileage. I would invest in long tube headers. Make sure you get a good set of ceramic coated headers and check the emissions laws before you install them. Summit racing has them. I believe you already have 1.6 stamped rockers. Check that out. I know the 96 went to roller rockers. If you have 1.6 stamped you won't get an additional lift. I upgraded from 1.5 stamped rockers to 1.6 RRs but I have a 88. I use the Comp Pro Magnum RRs. I got an additional .030 lift and that gained about 15 HP. The best RRs in my opinion are these:

http://store.summitracing.com/partdetail.asp?part=CRN-10758-16&autoview=sku
Actually, 3.73 gears will "improve" quarter mile times GREATLY on both 100% bone stock and heavily modified A4 LT1 Vette's...gas mileage will ofcourse suffer a bit , but really only a couple miles per gallon on the highway.....and the around town driving gas mileage dosn't change much at all, since the car will accelerate much more easily with less gas pedal movement.. .....3.73's have been a "tried and true" all around driving and quarter mile gearing for the LT1 A4 transmission Vette's for many years......3.45's and 3.55's are also good ratios for the A4 LT1's , "especially" if you are really into getting alright mileage.........The Problem is that 3.07 geared and numerically lower (IE:2.59) A4 LT1 Vette's are not even much into their (1 to 1 ratio) 3rd gear going thru the traps in the quarter mile.... the A4 transmission gears are SUPER long and spaced between eachother (ratio wise) and they NEED the lower rear end gears for best performance...............Also, 95 Vette's come with crappy stamped steel (rated at 1.5) self aligning rockers......but when they're measured, they actually end up closer to a 1.44-1.46 ratio........also, self aligning roller rockers ("especially" in the super small 3/8 size in the link) are not really anywhere near the best or most reliable roller rockers out there.....any good engine builder or shop will 99% of the time use a good (but expensive) shaft mount rocker system, or at the "very least", if cost is an issue, a good set of NON-self aligning roller rockers like the Comp Pro-Mag 7/16 NSA rockers.......Self aligning rockers are good for a quick throw in roller rocker in very limited RPM applications, but they just don't have the reliability of the NSA or shaft type rockers.......................Joe:thumbsup:
 

·
Registered
Joined
·
911 Posts
The first thing on your list should be to cross off ALL of the shops that suggested you get a "chip" and never go to those places again. Get your car professionally tuned. Anything else is a waste.
 

·
Registered
Joined
·
441 Posts
The first thing on your list should be to cross off ALL of the shops that suggested you get a "chip" and never go to those places again. Get your car professionally tuned. Anything else is a waste.
Yea.... if a shop recomends ya to put a chip in a 95 LT1...RUN as fast as you can........no chips in those years:laughing:
 

·
DC Crew
Joined
·
32,974 Posts
My vote is rear gears. Of all the things I have done to my car Long tube headers and 3" exhaust included the gears were the best seat of the pants feel and bang for the buck.:thumbsup:
I went from 3.07's to 3.73's.
 
1 - 14 of 14 Posts
Top