LS3 build finally moving along - Team Camaro Tech
LSx Swap LSx Engines in Non-LSx Vehicles

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post #1 of 154 (permalink) Old Aug 6th, 17, 01:26 PM Thread Starter
DT
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LS3 build finally moving along

OK guys, I'm finally moving forward. I just dropped the LS3 in today. I installed the ECM above the batt tray on the pass fender with a bracket I made, (template from another member on Lateral G). Harness is almost ready to plug in. Fuse box is mounted. Headers are in. Its a slow build, but I'm moving forward now LOL. Thanks to a bunch of guys on here, things are getting done. The wood is keeping the engine from hitting the firewall. Haha. Tranny to be installed later. Here are a couple of pics, nothing fancy.
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1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373
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post #2 of 154 (permalink) Old Aug 6th, 17, 01:52 PM
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Re: LS3 build finally moving along

Looking Good!
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post #3 of 154 (permalink) Old Aug 7th, 17, 10:27 AM
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Re: LS3 build finally moving along

are you putting in a tremec 6 speed? the hooker kit is awesome. Everything fit like a glove!
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post #4 of 154 (permalink) Old Aug 7th, 17, 01:33 PM Thread Starter
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Re: LS3 build finally moving along

TJ, I have the TKO 5 speed. So far the Holley/Hooker kit was seamless.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
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post #5 of 154 (permalink) Old Aug 7th, 17, 03:25 PM Thread Starter
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Re: LS3 build finally moving along

Solenoid, battery cable, starter trigger wire installed.
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post #6 of 154 (permalink) Old Aug 7th, 17, 03:49 PM
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Re: LS3 build finally moving along

Like it. Putting the ECU where you can access it if you have to is a very good idea. The LS7 car I built I mounted it up under the dash and AC evaporator. PIA to get to. Never again.

Mark Stilow mentioned he did the same thing once and only once. I now put them where you did or hide them in plain site with w Dirty Dingo Bracket on the smoothed firewall
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post #7 of 154 (permalink) Old Aug 7th, 17, 04:39 PM Thread Starter
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Re: LS3 build finally moving along

Quote:
Originally Posted by Vega$69 View Post
Like it. Putting the ECU where you can access it if you have to is a very good idea. The LS7 car I built I mounted it up under the dash and AC evaporator. PIA to get to. Never again.

Mark Stilow mentioned he did the same thing once and only once. I now put them where you did or hide them in plain site with w Dirty Dingo Bracket on the smoothed firewall
John, the ECM mount came out great. The bracket mounts to the fender and the radiator support.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
1969 Convertible LS3 TKO 600, 373
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post #8 of 154 (permalink) Old Aug 14th, 17, 02:33 PM
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Re: LS3 build finally moving along

DT,

I've been searching around this, and other, sites looking for information regarding LS swaps with a TKO transmission using the newer Hooker/Holley kits. It looks like we're starting to see a few swaps using the Holley kit with a TKO. I sort of gave up on this route after being told by two different Holley techs that the TKO will/may work with their kit.

So, it looks like your happy with your Holley swap kit, correct? I'm guessing you used their clamshell-mount setup, 302-2 oil pan, headers (which headers did you go with?)? How about the transmission cross-member, did you use one from a TKO kit? Any modifications to the cross-member needed to achieve a decent incline angle?

I apologize for the ton of questions, but I feel this Holley system can be a "no-brainer" under the right conditions.

Thanks,
Lee
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post #9 of 154 (permalink) Old Aug 14th, 17, 03:54 PM
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Re: LS3 build finally moving along

Which LS3 did you use? 430, 480, 525? I still have not settled on my choice.

Can you post a link to the bracket template?

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post #10 of 154 (permalink) Old Aug 14th, 17, 05:40 PM
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Re: LS3 build finally moving along

Quote:
Originally Posted by pwentz3l View Post
Which LS3 did you use? 430, 480, 525? I still have not settled on my choice.
I suggest the 480 as it is better than stock with a somewhat 'cammy' sound yet not so much that you can't idle smoothly. 500 HP is just right!


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post #11 of 154 (permalink) Old Aug 15th, 17, 02:34 PM Thread Starter
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Re: LS3 build finally moving along

Quote:
Originally Posted by Lee N View Post
DT,

I've been searching around this, and other, sites looking for information regarding LS swaps with a TKO transmission using the newer Hooker/Holley kits. It looks like we're starting to see a few swaps using the Holley kit with a TKO. I sort of gave up on this route after being told by two different Holley techs that the TKO will/may work with their kit.

So, it looks like your happy with your Holley swap kit, correct? I'm guessing you used their clamshell-mount setup, 302-2 oil pan, headers (which headers did you go with?)? How about the transmission cross-member, did you use one from a TKO kit? Any modifications to the cross-member needed to achieve a decent incline angle?

I apologize for the ton of questions, but I feel this Holley system can be a "no-brainer" under the right conditions.

Thanks,
Lee
Hello Lee. So far the LS 3/495 dropped right in with the Holley swap kit. Headers (Hooker long tube 2276), Motor mounts, everything fit like a glove. As far as the TKO, well right now I'm having issues finding the correct TO bearing. I had to return the LS7 clutch kit as McLeod told me the LS7 clutch kit and their TO bearing will NOT work. The x member I will be using is from Hurst Drivelines. I had the one from my kit (SST Transmissions) but I returned that one for the Hurst Driveline one. I have not mounted the TKO yet, so I can't say what problems I ran into if any. I don't think driveline angle will be a problem.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
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post #12 of 154 (permalink) Old Aug 15th, 17, 02:37 PM Thread Starter
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Re: LS3 build finally moving along

Quote:
Originally Posted by pwentz3l View Post
Which LS3 did you use? 430, 480, 525? I still have not settled on my choice.

Can you post a link to the bracket template?
I have the LS3 480 which they now claim is 495. Which Bracket ?? The ECM ?? If yes, I made my own using a template from a member over at Lateral G. LMK if any pics will help.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
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post #13 of 154 (permalink) Old Aug 15th, 17, 05:15 PM
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Re: LS3 build finally moving along

Quote:
Originally Posted by DT View Post
I have the LS3 480 which they now claim is 495. Which Bracket ?? The ECM ?? If yes, I made my own using a template from a member over at Lateral G. LMK if any pics will help.
Yes, the bracket. If you could post a link to the template, I would appreciate it.

I'm at a toss up between the 495 and 525. It was always going to be the 525... but some consultants have hinted towards the 480 (495)...

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post #14 of 154 (permalink) Old Aug 15th, 17, 05:32 PM Thread Starter
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Re: LS3 build finally moving along

Quote:
Originally Posted by pwentz3l View Post
Yes, the bracket. If you could post a link to the template, I would appreciate it.

I'm at a toss up between the 495 and 525. It was always going to be the 525... but some consultants have hinted towards the 480 (495)...
Yes, the 480 is a very good platform. I have heard a few negative reviews of the 525 version. Guys were complaining of the cam and street ability. Go figure LOL . I don't have any link for the template. The guy over at Lateral G sent it to me via the US Mail. I have the actual sheet metal template.

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post #15 of 154 (permalink) Old Aug 16th, 17, 04:21 AM
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Re: LS3 build finally moving along

I have the LS3/480 with a 4L70E and it is extremely streetable. Very mild mannered off of idle and has a decent lope to it at idle. Nothing crazy but enough of one to let everyone know you have a cam in it. I don't know a ton about the 525 version but if I were wanting more HP down the road you can toss in a cam from Texas Speed/Brian Tooley and get a nice bump doing nothing else.

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