Here is what I have so far
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
Here is what I have so far
[IMG]
[/IMG]
On my way to converting to a LT4 from a 92 LT1. I still need the Hot cam kit and 95 opti and all the gaskets. I'll be taking pictures along the way. If anyone has done this upgrade and has a few pictures or advice please jump in.
[/IMG]On my way to converting to a LT4 from a 92 LT1. I still need the Hot cam kit and 95 opti and all the gaskets. I'll be taking pictures along the way. If anyone has done this upgrade and has a few pictures or advice please jump in.
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
/strongstartisstrong 
i would recommend figuring out your hp range and then needed injector size while your here... something I didn't do when I planned mine and am now asking all over about
also tuning.
i would recommend figuring out your hp range and then needed injector size while your here... something I didn't do when I planned mine and am now asking all over about
also tuning.
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
Racer
Joined: Aug 2008
Posts: 301
Likes: 17
From: Toronto Ontario
Your '92 had a "one year only" opti harness which has a square-end connection on one end and a short connection on the opti-side. If you're updating to a later style vented design, you'll have to upgrade the harness as well.
You can do this by either buying a later-model harness, cutting off the one end and splicing in your '92 specific square end, or, even easier, buy a harness that's already been spliced for you for a quick, simple, plug and play swap.
Should only run you up another $45 or so which, judging by the amount of money you've spent so far, shouldn't be that big of a deal.
Here's a place that sells the harness I'm referring to.
Hope this helps. Good luck with the upgrades.
http://www.nookandtranny.com/mm5/mer...egory_Code=WIR
You can do this by either buying a later-model harness, cutting off the one end and splicing in your '92 specific square end, or, even easier, buy a harness that's already been spliced for you for a quick, simple, plug and play swap.
Should only run you up another $45 or so which, judging by the amount of money you've spent so far, shouldn't be that big of a deal.
Here's a place that sells the harness I'm referring to.
Hope this helps. Good luck with the upgrades.
http://www.nookandtranny.com/mm5/mer...egory_Code=WIR
Last edited by LT1*C4; Aug 18, 2011 at 10:31 PM.
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
I can only average what other guys posted for hp ranges and that would be around 400 plus at the crank. That's good enough for now. I also learned that injectors on the LT4 are 28lbs and they should be fine, but I haven't bought those yet. Maybe 30lbs would be better? For tuning, I'll be going with PCM here on the forum.
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
Your '92 had a "one year only" opti harness which has a square-end connection on one end and a short connection on the opti-side. If you're updating to a later style vented design, you'll have to upgrade the harness as well.
You can do this by either buying a later-model harness, cutting off the one end and splicing in your '92 specific square end, or, even easier, buy a harness that's already been spliced for you for a quick, simple, plug and play swap.
Should only run you up another $45 or so which, judging by the amount of money you've spent so far, shouldn't be that big of a deal.
Here's a place that sells the harness I'm referring to.
Hope this helps. Good luck with the upgrades.
http://www.nookandtranny.com/mm5/mer...egory_Code=WIR
You can do this by either buying a later-model harness, cutting off the one end and splicing in your '92 specific square end, or, even easier, buy a harness that's already been spliced for you for a quick, simple, plug and play swap.
Should only run you up another $45 or so which, judging by the amount of money you've spent so far, shouldn't be that big of a deal.
Here's a place that sells the harness I'm referring to.
Hope this helps. Good luck with the upgrades.
http://www.nookandtranny.com/mm5/mer...egory_Code=WIR
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
I can only average what other guys posted for hp ranges and that would be around 400 plus at the crank. That's good enough for now. I also learned that injectors on the LT4 are 28lbs and they should be fine, but I haven't bought those yet. Maybe 30lbs would be better? For tuning, I'll be going with PCM here on the forum.
http://www.ajdesigner.com/phpengine/...efficiency.php
http://users.erols.com/srweiss/calcpchg.htm
http://www.z31.com/software/injector.pl
http://forums.corvetteforum.com/c4-t...questions.html
http://www.bgsoflex.com/pwcomp.html
Or, I can tell you to call John Banner, at FICinjectors, and have him select the appropriate size Bosch 3's to fit your engine. it's what I finally did today.
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Racer
Joined: Dec 2007
Posts: 298
Likes: 1
From: Escondido CA
Your '92 had a "one year only" opti harness which has a square-end connection on one end and a short connection on the opti-side. If you're updating to a later style vented design, you'll have to upgrade the harness as well.
You can do this by either buying a later-model harness, cutting off the one end and splicing in your '92 specific square end, or, even easier, buy a harness that's already been spliced for you for a quick, simple, plug and play swap.
Should only run you up another $45 or so which, judging by the amount of money you've spent so far, shouldn't be that big of a deal.
Here's a place that sells the harness I'm referring to.
Hope this helps. Good luck with the upgrades.
http://www.nookandtranny.com/mm5/mer...egory_Code=WIR
You can do this by either buying a later-model harness, cutting off the one end and splicing in your '92 specific square end, or, even easier, buy a harness that's already been spliced for you for a quick, simple, plug and play swap.
Should only run you up another $45 or so which, judging by the amount of money you've spent so far, shouldn't be that big of a deal.
Here's a place that sells the harness I'm referring to.
Hope this helps. Good luck with the upgrades.
http://www.nookandtranny.com/mm5/mer...egory_Code=WIR
You should create a thead when you start swapping for us to enjoy... Also, Im interested in hearing about PCM mentioned and the tuning on this build...
Good Luck!
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
I do plan on taking photos and writing a journal about the build. It'll be our own reality show right here on CF. I'll use the FSM for most of my information because it sets up a good checklist of things to be done and in order. But there is always something that it doesn't explain very well or assumes you know how to do. What I need is a better photo program than what I have on my computer. Mine is too complex just to load photos.
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
I second this part, Bought my 95+ opti conversion harness from these guys on ebay when I cammed and rebuilt my engine... It was a nice plug and play deal with no wire spliceing!
You should create a thead when you start swapping for us to enjoy... Also, Im interested in hearing about PCM mentioned and the tuning on this build...
Good Luck!
You should create a thead when you start swapping for us to enjoy... Also, Im interested in hearing about PCM mentioned and the tuning on this build...
Good Luck!
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
I'm not doing any major porting, just port matching and polishing. I'd sure like to learn how to polish the ports.
Now that I have most of the harder parts to get in hand, I'm really getting excited to start this upgrade. Once I have ALL the parts in hand and my garage is spotless, I'll pull the trigger and start the fun.
Now that I have most of the harder parts to get in hand, I'm really getting excited to start this upgrade. Once I have ALL the parts in hand and my garage is spotless, I'll pull the trigger and start the fun.
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
The black box is the Kent-Moore tool for removing and installing the LT1/4 crank hub. I just bought it as I didn't want to struggle with that again. The headers were around $500, but that was a few years ago. Like I said, I've been collecting these parts for a long time.