We are currently running on the new domain and server: www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

Search found 15 matches

by Bill Chase
Tue Jan 14, 2020 3:35 am
Forum: Engine Tech
Topic: 4150 4778 Holley carb questions
Replies: 12
Views: 569

Re: 4150 4778 Holley carb questions

1984 crossfire corvette with l83, top end is essentially garbage, but it does have heavy trw pistons that are forged, cheap fun with minimal cash outlay is the goal. As near as I can tell the intake and carb I have will fit without hood cutting, although fitting a breather may be a challenge. Bill, ...
by Bill Chase
Mon Jan 13, 2020 10:38 am
Forum: Engine Tech
Topic: 4150 4778 Holley carb questions
Replies: 12
Views: 569

Re: 4150 4778 Holley carb questions

Plan to mill the divider to match the air gap performer rpm, and can run a spacer if needed, I have no idea what jets are in it, but would like to get an assortment to help tune, I realize this is probably far from an optimal setup, but the plan is simply to have fun, not spend a ton of cash and whe...
by Bill Chase
Mon Jan 13, 2020 10:33 am
Forum: Engine Tech
Topic: 4150 4778 Holley carb questions
Replies: 12
Views: 569

4150 4778 Holley carb questions

I picked up a 4778 700 cfm double pumper from a friend, it was drained and stored properly a couple years ago. I bought a quick fuel basic rebuild kit for it. I hope to simply freshen it up and use it on a budget, but rather "rowdy" street strip toy. 350 l83 crossfire corvette bottom end, probably a...
by Bill Chase
Mon Jan 13, 2020 10:31 am
Forum: Engine Tech
Topic: 4150 4778 Holley carb questions
Replies: 0
Views: 118

4150 4778 Holley carb questions

I picked up a 4778 700 cfm double pumper from a friend, it was drained and stored properly a couple years ago. I bought a quick fuel basic rebuild kit for it. I hope to simply freshen it up and use it on a budget, but rather "rowdy" street strip toy. 350 l83 crossfire corvette bottom end, probably a...
by Bill Chase
Mon Nov 25, 2019 3:11 am
Forum: Engine Tech
Topic: Hei ignition system questions.
Replies: 6
Views: 487

Hei ignition system questions.

When running a decent amount of overlap and higher compression on a street engine, are there benefits to using the msd 6al system with tpi hei? Also how low of resistance plug wires can I run without having rf noise that causes problems with the radio. Basically I want the hottest ignition I can get...
by Bill Chase
Sun Oct 20, 2019 7:40 am
Forum: Engine Tech
Topic: 305 head flow possibilities?
Replies: 52
Views: 2540

Re: 305 head flow possibilities?

113 corvette castings are cheap. Easier to port.
by Bill Chase
Sun Sep 22, 2019 2:01 pm
Forum: Engine Tech
Topic: 80's era accel piggyback tuners
Replies: 1
Views: 308

80's era accel piggyback tuners

Saw an interesting thing on Ebay. Accel 74520 master tuner. Ligenfelter mentions briefly piggyback tuners of the tpi era and shows a picture of an accel "master tuner" I have googled and even searched the old geocities as well as Yahoo stuff and found nothing. For 25 bucks I went ahead and bought it...
by Bill Chase
Tue Sep 03, 2019 10:02 am
Forum: Engine Tech
Topic: 1991 c4 corvette L98 engine questions, options, mass confusion.
Replies: 46
Views: 1511

Re: 1991 c4 corvette L98 engine questions, options, mass confusion.

The big tube ported aftermarket base tpi stuff will make his power. It will peak 4400-4600 and hold to 4800-5000 but its been done many times. Welding the base up and raising injectors up to gain cross sectional area is the only way to really get more out of them systems People act like it peaks an...
by Bill Chase
Tue Sep 03, 2019 5:40 am
Forum: Engine Tech
Topic: 1991 c4 corvette L98 engine questions, options, mass confusion.
Replies: 46
Views: 1511

Re: 1991 c4 corvette L98 engine questions, options, mass confusion.

Want the sale? I need a guaranteed to work and play nice together package I can bolt on in a weekend, then throw on trailer and take to dyno to be tuned, unless of course there is a package with custom parameters chip you sell..?? You come highly recommended sir. Edit* thought I was quoting Chris Sp...
by Bill Chase
Mon Sep 02, 2019 3:44 pm
Forum: Engine Tech
Topic: 1991 c4 corvette L98 engine questions, options, mass confusion.
Replies: 46
Views: 1511

Re: 1991 c4 corvette L98 engine questions, options, mass confusion.

I know I sound like I am just bench racing, truth is I have the car, fuel economy is not a concern, and this isnt a budget build per se, all told there is about 9 grand to put into this car it needs tires, some shocks and basic maintenance stuff done, the big criteria are keeping ac, cruise, and not...
by Bill Chase
Mon Sep 02, 2019 8:45 am
Forum: Engine Tech
Topic: 1991 c4 corvette L98 engine questions, options, mass confusion.
Replies: 46
Views: 1511

Re: 1991 c4 corvette L98 engine questions, options, mass confusion.

Also, no emissions checks here, so egr, a.i.r. injection etc can go. Big thing here is keeping the outward appearance of OEM, meaning all guage and ac etc work. Any intake setup is fine provided if can be tuned with the OEM computer, obviously with a new prom burnt and time on the dyno.
by Bill Chase
Mon Sep 02, 2019 8:41 am
Forum: Engine Tech
Topic: 1991 c4 corvette L98 engine questions, options, mass confusion.
Replies: 46
Views: 1511

Re: 1991 c4 corvette L98 engine questions, options, mass confusion.

Car has the 3:45 gears, at least according to the rpo build list, I suggested a blower, this is a joint father son project for my recently retired father.for a lot of reasons he is against forced induction. Think a solit 10 to 1 383 shortblock, lt4 hotcam, headers, and aftermarket runners, ported ba...
by Bill Chase
Sun Sep 01, 2019 9:01 am
Forum: Engine Tech
Topic: 1991 c4 corvette L98 engine questions, options, mass confusion.
Replies: 46
Views: 1511

Re: 1991 c4 corvette L98 engine questions, options, mass confusion.

Yeah, tpi does a lot very good, if only they had designed it to pull another 1000 rpms making power. I suspect that's the exact criteria they had when designing the lt1 of that era, interesting thing is late model vortec heads are essentially lt1 heads with standard cooling. Hence the idea of vortec...
by Bill Chase
Sun Sep 01, 2019 7:45 am
Forum: Engine Tech
Topic: 1991 c4 corvette L98 engine questions, options, mass confusion.
Replies: 46
Views: 1511

1991 c4 corvette L98 engine questions, options, mass confusion.

91 c4 corvette 6 speed car, would like to stay with OEM computer and simply have it tuned. Application) For a street car, where ac, cruise control and all dash functions are a must. Desired result) a streetable wide torque curve with a solid 300-320 rwhp. The good) Love the car, picked it up for 3 g...
by Bill Chase
Tue Aug 27, 2019 1:15 pm
Forum: Engine Tech
Topic: Any good pics of ported L98, ZZ4, 113 casting heads?
Replies: 27
Views: 3359

Re: Any good pics of ported L98, ZZ4, 113 casting heads?

Were these used with a tpi setup?