Considering an LS swap - Page 2 - Chevelle Tech
El Caminos El Camino & Sprint

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post #16 of 27 (permalink) Old Jul 13th, 19, 7:19 AM
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Re: Considering an LS swap

Quote:
Originally Posted by Hotwire View Post
You have any track times? Everyone's butt dyno isn't calibrated the same. 😉
I don't understand what good are track times on a street car.. A street car should be designed to climb hills without the need to build up revs, it also should be able to power torque deep turns, run smoothly and start easily... A compression of 9:1 is usually best for what I like..

A drag car should have max power in a short rpm range.. This doesn't work to well on the street were you need power right off idle..

My butt dyno seems to show more power to the car that carries it around the most.
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post #17 of 27 (permalink) Old Jul 13th, 19, 7:32 AM
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Just collecting data. This thread is about considering an LS. A low compression 454 with 2.87 gears does raise an eyebrow as the stats aren't there and it does not sound like a ripper (no offense). Was just asking if you had any track times so I (or we as a directive group) could determine if this was an alternative to the LS platform.

*Jeff*

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post #18 of 27 (permalink) Old Jul 15th, 19, 1:29 PM
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Re: Considering an LS swap

You'll never regret the LS swap...

"LS swap without breaking the bank"

"Project Greenbrier" build thread...
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post #19 of 27 (permalink) Old Jul 15th, 19, 6:18 PM
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Re: Considering an LS swap

Damn 255 Walbro in-tank pump took a dump today...2 hrs total run time.
Wired correctly thru a relay and in a baffled Tanks Inc tank.

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post #20 of 27 (permalink) Old Jul 15th, 19, 7:25 PM
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Re: Considering an LS swap

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Damn 255 Walbro in-tank pump took a dump today...2 hrs total run time.(
I got burned on a couple knock-off pumps...one Walbro, and a couple AC-Delco ep381's...Chinese or Jap origin when I finely go to the bottom of it. (All three boxed in perfectly printed "OE" looking boxes.)


Did yours come with the tank??

"LS swap without breaking the bank"

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post #21 of 27 (permalink) Old Jul 15th, 19, 7:37 PM
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Re: Considering an LS swap

Could be.
Bought the complete kit...pump, gauge sending unit, regulator, hose, fittings, hangers, and tank... from Tanks Inc.

Thinking about simplifying things and install the Holley 12-300 into the stock tank.

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post #22 of 27 (permalink) Old Jul 15th, 19, 7:44 PM
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Re: Considering an LS swap

And need to get that air filter moved into cooler air... 4" piping needed.
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post #23 of 27 (permalink) Old Jul 15th, 19, 9:32 PM
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Re: Considering an LS swap

Some fuel pumps aren't able to handle full time full voltage and current, they need PWM power. Check with the maker. Externally mounted in-line pumps will run hotter, more so if it's powered with full time full voltage and current.

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post #24 of 27 (permalink) Old Jul 15th, 19, 11:40 PM
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Re: Considering an LS swap

No! Don't look into the light! LS motors are ugly and have no place in an old car. It's your car so do what you want, but there's nothing wrong with an old school BBC or SBC, or fuel injected old school.

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post #25 of 27 (permalink) Old Jul 16th, 19, 1:27 AM
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Re: Considering an LS swap

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Originally Posted by steve69ss396 View Post
no! Ls motors are ugly and have no place in an old car.


lol!!!

Yeah, this perfectly executed swap is really hard on the eyes...
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post #26 of 27 (permalink) Old Jul 16th, 19, 8:58 AM
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Re: Considering an LS swap

Quote:
Originally Posted by paul bell View Post
Some fuel pumps aren't able to handle full time full voltage and current, they need PWM power. Check with the maker. Externally mounted in-line pumps will run hotter, more so if it's powered with full time full voltage and current.
Yes, both Tanks Inc and FiTech have specific PWM setting recommendations for this combo.
Need to set PWM to 100, which I have.

I've got a new Tanks Inc pump being delivered today...a GPA-5.
Went up one size.

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post #27 of 27 (permalink) Old Jul 16th, 19, 6:29 PM
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Re: Considering an LS swap

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Originally Posted by BillsCamino View Post
Yes, both Tanks Inc and FiTech have specific PWM setting recommendations for this combo.
Need to set PWM to 100, which I have.

I've got a new Tanks Inc pump being delivered today...a GPA-5.
Went up one size.

That Walbro pump should have held up, but stuff happens. I've been running a Walbro GSL-392 external inline pump just in front of my stock tank for going on 3 years. It does not run hot, it doesn't even run warm, and it is at 100% PWM, which equates to no PWM.

BTW - My external pump has Made in USA stamped into the case. I guess knock offs could do the same, but I don't know. Bought 2 of them from Summit. One is sitting in the box in a tool bag behind the passenger's seat of my sled. Still waiting for the other one to fail. Knock on aluminum.

Best of luck with the new pump.

Forgot to add. I'm too lazy to do a LS swap, and I've thought about every time I pull the 350 out to work on it. Last time I pulled the front end off, and that would have been the perfect time, but talked myself out of it, and put a retro roller, and some new bearings in the ole gen 1. The gen 1 5.7 makes enough tire smoke to satisfy me. Racing and getting time slips is not in the cards. Maybe 30 years ago, not now though. My eye sight and reaction times were a lot better 30 years ago.
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