69 Camaro LQ9 swap questions - Team Camaro Tech
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post #1 of 18 (permalink) Old Oct 20th, 16, 01:11 PM Thread Starter
Brian
 
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69 Camaro LQ9 swap questions

I have recently purchased an LQ9 that was a fresh build and has no miles on the fresh build. The motor has stock 317 heads and an MS4 cam with comp .660" lift valve spring, push rods, ls7 lifters, ARP rod bolts, and trunnion kit. I will be using an LS6 intake manifold as well.

I am a little concerned about ptv clearance since I have heard that this could be an issue with the MS4 cam.

Has anyone used this cam and how did you avoid ptv interference?

Can you use the LS2 water pump instead of the L99 water pump to keep the outlet on the passenger side or does the side that the outlet is on really even matter?

Thank you for your helping me out.
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post #2 of 18 (permalink) Old Oct 20th, 16, 01:20 PM
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Re: 69 Camaro LQ9 swap questions

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Originally Posted by bfowl33 View Post
I have recently purchased an LQ9 that was a fresh build and has no miles on the fresh build. The motor has stock 317 heads and an MS4 cam with comp .660" lift valve spring, push rods, ls7 lifters, ARP rod bolts, and trunnion kit. I will be using an LS6 intake manifold as well.

I am a little concerned about ptv clearance since I have heard that this could be an issue with the MS4 cam.

Has anyone used this cam and how did you avoid ptv interference?

Can you use the LS2 water pump instead of the L99 water pump to keep the outlet on the passenger side or does the side that the outlet is on really even matter?

Thank you for your helping me out.
Did the builder check PTV?

I looked at this cam to go in an LQ9 and planned on flycutting the pistons for clearance.

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post #3 of 18 (permalink) Old Oct 20th, 16, 01:28 PM Thread Starter
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Re: 69 Camaro LQ9 swap questions

I do not know if he did or not. I am going to get in contact with him and see.

I was trying to avoid to have to flycut them but if it is necessary then I will. I mean after if would be a precaution to go ahead and cut them so you don't have to worry about valve floating causing an issue.
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post #4 of 18 (permalink) Old Oct 20th, 16, 01:29 PM Thread Starter
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Re: 69 Camaro LQ9 swap questions

Vega$69 do you have any input on the water pump question?
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post #5 of 18 (permalink) Old Oct 20th, 16, 01:49 PM Thread Starter
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Re: 69 Camaro LQ9 swap questions

Just spoke with him and he did not. He assumes that if I don't have the heads milled then I should be fine when it comes to ptv.

What is the minimum ptv that you should keep?
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post #6 of 18 (permalink) Old Oct 20th, 16, 02:25 PM
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Re: 69 Camaro LQ9 swap questions

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Originally Posted by bfowl33 View Post
Just spoke with him and he did not. He assumes that if I don't have the heads milled then I should be fine when it comes to ptv.

What is the minimum ptv that you should keep?
Assuming is a bad answer from an engine builder. The only way to know for certain it to measure PTV

I don't understand why "engine builders" think it's OK not to check things like this. It only takes a few minutes.

If it was mine I'd pull the heads and check PTV clearance and everything anything else he may have assumed would be OK.

Water Pump should work fine. Plan you intake air tubing and accessories to make sure it all fits and clears as well.

Last edited by Vega$69; Oct 20th, 16 at 07:36 PM.
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post #7 of 18 (permalink) Old Oct 20th, 16, 02:42 PM Thread Starter
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Re: 69 Camaro LQ9 swap questions

Yeah I plan to check it. The heads were never installed and are not assembled yet. I will be assembling them and checking the ptv along with the rod bolts when I change the oil pan to the f-body pan. I wouldn't say he is an actual engine builder but has built a few and never completed this motor due to needing cash for other matters and needed to sell it.

It the LS2 water pump pulley the same distance from the block as the lq9's? or will it need the water pump .75" spacer?

Plan on doing something like this for my build:

Last edited by bfowl33; Jan 27th, 17 at 09:27 AM.
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post #8 of 18 (permalink) Old Oct 20th, 16, 05:34 PM
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Re: 69 Camaro LQ9 swap questions

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Originally Posted by Vega$69 View Post
Assuming is a bad answer from an engine builder. The only way to know for certain it to measure PTV

I don't understand why "engine builders" think it's OK not to check things like this. It only takes a few minutes.

If it was mine I'd pull the heads and check PTV clearance and everything anything else he may have assumed would be OK.

Water Pump should work fine. Plan you intake air tubing and accessories to make sure it all fits and clears as well.
John,

I think PTV clearance can be checked with the head on.

He will need a dial indicator and a way to disassemble the valve spring and install a lightweight spring.

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post #9 of 18 (permalink) Old Oct 20th, 16, 06:42 PM
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Re: 69 Camaro LQ9 swap questions

PTV. Clay on the piston. Bolt on head rotate the motor measure the clay.

Don't know how you can determine clearance any other way.
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post #10 of 18 (permalink) Old Oct 20th, 16, 07:02 PM
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Re: 69 Camaro LQ9 swap questions

Pretty sure PTV can be checked with a lightweight checking spring and dial indicator as Lawrence454 suggested. At least I did it that way several years ago. The clay method works too.

Clean And Clear: How To Measure Piston-To-Valve Clearance - Power & Performance News

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post #11 of 18 (permalink) Old Oct 20th, 16, 07:38 PM
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Re: 69 Camaro LQ9 swap questions

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Pretty sure PTV can be checked with a lightweight checking spring and dial indicator as Lawrence454 suggested. At least I did it that way several years ago. The clay method works too.

Clean And Clear: How To Measure Piston-To-Valve Clearance - Power & Performance News

Don
I stand corrected. You can check with heads on.

Thanks for the info
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post #12 of 18 (permalink) Old Oct 24th, 16, 12:05 PM
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Re: 69 Camaro LQ9 swap questions

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Originally Posted by bfowl33 View Post
Yeah I plan to check it. The heads were never installed and are not assembled yet. I will be assembling them and checking the ptv along with the rod bolts when I change the oil pan to the f-body pan. I wouldn't say he is an actual engine builder but has built a few and never completed this motor due to needing cash for other matters and needed to sell it.

It the LS2 water pump pulley the same distance from the block as the lq9's? or will it need the water pump .75" spacer?

Plan on doing something like this for my build:
The LQ9 and L99 water pumps use the same pulley spacing, but have the outlets on opposite sides. I did this swap a few years ago and posted it over on ls1tech with some other info as well: LQ9 vs L99 Water Pump pics - LS1TECH

LQ9 on top, L99 on bottom:


LQ9 on right, L99 on left:


I may have posted it somewhere on this site as well.


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post #13 of 18 (permalink) Old Oct 24th, 16, 12:21 PM Thread Starter
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Re: 69 Camaro LQ9 swap questions

I saw that thread but I am wanting the exit on the passenger side of the motor instead of the drivers side like the picture I posted on Post #7. Would the LS1/LS2 water pump work with the .75" adapter?
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post #14 of 18 (permalink) Old Oct 24th, 16, 01:22 PM
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Re: 69 Camaro LQ9 swap questions

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I saw that thread but I am wanting the exit on the passenger side of the motor instead of the drivers side like the picture I posted on Post #7. Would the LS1/LS2 water pump work with the .75" adapter?
Which balancer and accessories are you running? LQ9?


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post #15 of 18 (permalink) Old Oct 24th, 16, 01:53 PM Thread Starter
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Re: 69 Camaro LQ9 swap questions

Well none at the moment but yes they will be LQ9.
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