LT1 Performance upgrades advice
Thread Starter
Intermediate
Joined: May 2007
Posts: 35
Likes: 0
LT1 Performance upgrades advice
Sorry, I've a few questions here but would be grateful for any and all advise as shipping parts to the UK can get real expensive if you order the wrong parts
My 'vette is a '94 LT1 auto with 3.07's, it has the following mods already:
Borla cat back
BBK 52mm TB
SLP air intake
Taylor leads
Accel pro-coil
160 thermostat
First I want to upgrade the torque convertor but there seems to be a lot of negative posts on here about the TCI and B&M ones.
Any suggestions on who's convertor to use?
Also what's the best speed to go for? 2,400 or 2,800
I will be using the car for 1/4 mileing and as a daily car in the summer.
When upgrading the torque convertor is there anything else I should upgrade at the same time?
I also want to change the gears, I've read the 4.11's are best for the 6 speeds, but what would be the best improvement over the 3.07's? also can anyone recommend a supplier.
Thanks for the help
My 'vette is a '94 LT1 auto with 3.07's, it has the following mods already:
Borla cat back
BBK 52mm TB
SLP air intake
Taylor leads
Accel pro-coil
160 thermostat
First I want to upgrade the torque convertor but there seems to be a lot of negative posts on here about the TCI and B&M ones.
Any suggestions on who's convertor to use?
Also what's the best speed to go for? 2,400 or 2,800
I will be using the car for 1/4 mileing and as a daily car in the summer.
When upgrading the torque convertor is there anything else I should upgrade at the same time?
I also want to change the gears, I've read the 4.11's are best for the 6 speeds, but what would be the best improvement over the 3.07's? also can anyone recommend a supplier.
Thanks for the help
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
I love my 3.45s and I probably would be happy with 3.7X gears too, however, a stall converter and the 3.07s might be OK too! But I'd look for something in the mid to high 3.XX JMHO
You can't go wrong with a Vig or a Yank converter.
Mike
You can't go wrong with a Vig or a Yank converter.
Mike
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
All your current mods are nice to have but you really won't see any performance increase with stock heads and cam.
a 2800 Vigilante and 3.73 gears is your best bang for the bucks.
a 2800 Vigilante and 3.73 gears is your best bang for the bucks.
Drifting
Joined: Oct 2005
Posts: 1,920
Likes: 51
From: Angier nc
I would swap the 48mm(stock) throttle body back on.It should help throttle response.
I would think a 3.36-3.54 gear would be about right.A 2600 stall converter and a shift kit(trans cooler also)should be on target.
Drag racing is fun,however with gas prices what they are(in the UK)I would err on the conservative side since you plan to use it for a daily driver as well.
I might even try the converter and shift kit before the gears.You may be happy enough to leave it alone.
If you do raise the stall and lower the gears I would be cautios of sticky tires.Dana 36 rears will only take so much abuse.Look for a D44 swap with the 3.45 gearset(factory) and have at it.
There was a post about stall converters in the last day or two with some good info.Try and find it.
I would think a 3.36-3.54 gear would be about right.A 2600 stall converter and a shift kit(trans cooler also)should be on target.
Drag racing is fun,however with gas prices what they are(in the UK)I would err on the conservative side since you plan to use it for a daily driver as well.
I might even try the converter and shift kit before the gears.You may be happy enough to leave it alone.
If you do raise the stall and lower the gears I would be cautios of sticky tires.Dana 36 rears will only take so much abuse.Look for a D44 swap with the 3.45 gearset(factory) and have at it.
There was a post about stall converters in the last day or two with some good info.Try and find it.
Thread Starter
Intermediate
Joined: May 2007
Posts: 35
Likes: 0
Thanks, regarding 'daily driving' my mileage during the summer will be tiny and to be honest unless you drive a 0.1 litre car in the UK then you're going to get spanked when it comes to fuel, (it's now over the £5 a gallon mark)
Is anyone running the 3.73's with a 2600 or 2800 torque?? and can anyone suggest a supplier??
Thanks
Is anyone running the 3.73's with a 2600 or 2800 torque?? and can anyone suggest a supplier??
Thanks
Melting Slicks
Joined: Feb 2006
Posts: 2,240
Likes: 0
From: Cleveland OHIO
Pro
Joined: Aug 2004
Posts: 549
Likes: 13
From: Richmond VA
Just put a 2800 Vigilate in my 94/A4 with a 3.07 rear and I am very happy with it. I would call them and see what TC they say would work for you. Be careful with that D36 rear (I am in the same boat).
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Verdad Gallardo
Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
Try just the 2800 stall converter first. That stall with the 3.07 gear is a good combo without spinning all day long. You can always go with a stickier tire but then you have to worry about the Dana 36. As it is with the 2800 you will really need at least a DR to see a decent improvement. I had a TCI converter that broke with the trans a week ago and it is in the shop right now getting a Vigilante and built up transmission to handle about 700hp. Now the rear is my main concern.
Last edited by rickneworleansla; Mar 25, 2008 at 10:41 AM.
