# 4 to 8 swap?!?!?!?
**URL:** https://forums.speedlife.net/t/4-to-8-swap/249920
**Category:** Builds
**Created:** [January 24, 2010, 3:25pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920 "2010-01-24T15:25:39Z")
**Posts on this page:** 20
**Page:** 4
### Author:  [@ReDevil](https://forums.speedlife.net/u/ReDevil)
#### Post date: [January 25, 2010, 11:10pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/61 "2010-01-25T23:10:28Z")
Oh, okay then.
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### Author:  [@mcflurry](https://forums.speedlife.net/u/mcflurry)
#### Post date: [January 25, 2010, 11:14pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/62 "2010-01-25T23:14:58Z")
> [@pump gas bitch 11.34 slight\_smile](https://forums.speedlife.net/t/pump-gas-bitch-11-34/28699/63):
>
> Oh, okay then.
well i dont know what ur talkin bout? the i dont give a fuck attitude? if so then yes:hug
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### Author:  [@Johawk](https://forums.speedlife.net/u/Johawk)
#### Post date: [January 26, 2010, 2:51am UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/63 "2010-01-26T02:51:02Z")
I got a 4L60E if you want to trade that LT1 for a 5.3 LSX
LT1 5.7L 10.5:1cr 275hp 91 octane
LM4 5.3L 9.5:1cr 295hp 87 octane
And they do make a carb maniflod for the LSX but you need the MSD Ignition box for the coil on plug
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### Author:  [@mcflurry](https://forums.speedlife.net/u/mcflurry)
#### Post date: [January 26, 2010, 3:22am UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/64 "2010-01-26T03:22:04Z")
ughhhhhh y does everyone want me to go lsx??? im gonna use what i have for at least this year.
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### Author:  [@Johawk](https://forums.speedlife.net/u/Johawk)
#### Post date: [January 26, 2010, 3:46pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/65 "2010-01-26T15:46:33Z")
> [@fs: Bike stuff.](https://forums.speedlife.net/t/fs-bike-stuff/28635/6):
>
> LT1 5.7L 10.5:1cr 275hp 91 octane
>
> LM4 5.3L 9.5:1cr 295hp 87 octane
Ummmmm thats why
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### Author:  [@silveradoman](https://forums.speedlife.net/u/silveradoman)
#### Post date: [January 26, 2010, 3:49pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/66 "2010-01-26T15:49:23Z")
> [@Resident "car guy" doesn't have the answer](https://forums.speedlife.net/t/resident-car-guy-doesnt-have-the-answer/28740/3):
>
> Not to mention that the LT1 is reverse coolant flow. You need a LT1 specific manifold due to Vortec style ports, different bolt patern, and the fact that there is no coolant cross over or disty hole in a LT1 intake. GMPP makes the only carb LT1 intake I know of.
the intake i habve works just fine…it has the hole for the disty and the coolant crossover in the front…
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### Author:  [@psi2high](https://forums.speedlife.net/u/psi2high)
#### Post date: [January 26, 2010, 3:50pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/67 "2010-01-26T15:50:59Z")
Because lt1’s are stone age technology compared to the lsx series
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### Author:  [@Johawk](https://forums.speedlife.net/u/Johawk)
#### Post date: [January 26, 2010, 3:58pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/68 "2010-01-26T15:58:09Z")
So you’re telling me a GenI intake works great on an LT1? Youre probably leaving 30-50hp on the table just due to the ports not lining up worth dick
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### Author:  [@silveradoman](https://forums.speedlife.net/u/silveradoman)
#### Post date: [January 26, 2010, 4:05pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/69 "2010-01-26T16:05:47Z")
never said that im saying the intake i put on mine, the port lines up and works fine…for dick
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### Author:  [@Johawk](https://forums.speedlife.net/u/Johawk)
#### Post date: [January 26, 2010, 4:36pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/70 "2010-01-26T16:36:40Z")
Im confused now…
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### Author:  [@zee\_oh\_sex](https://forums.speedlife.net/u/zee_oh_sex)
#### Post date: [January 26, 2010, 4:49pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/71 "2010-01-26T16:49:22Z")
wicked confused, and seans wrong the lt1 isnt stone age technology i have to say, but the lsx series chevy small blocks are just lightyears ahead, lt1’s go god damn good when work is put to them but their ignitions are a bit weak…ive seen personally carbed lt1’s go good, the long intake runners really help the motor out, a nice cam, the gmpp intake and proper air and fuel with your carb will make this one fun ass truck…lsx would be awesome but, also much more expensive.
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### Author:  [@Johawk](https://forums.speedlife.net/u/Johawk)
#### Post date: [January 26, 2010, 5:10pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/72 "2010-01-26T17:10:54Z")
I wouldnt say much more expensive. There are thousands of trucks built every year and these motors are much more plentiful than LT1s and Vortecs. The low CR makes it even better cause you can run 87 now and 20psi boost later. The LT1 is still a great engine but its becoming less practical every day
LT1 - 92-97
350 Vortec or L31 96-01
LSX - 99-present
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### Author:  [@psi2high](https://forums.speedlife.net/u/psi2high)
#### Post date: [January 26, 2010, 5:54pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/73 "2010-01-26T17:54:29Z")
Pfft lt1’s are dogs compared to the ls platform. The ignition system is complete shit and they fall off top end like theres no tomorrow
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### Author:  [@zee\_oh\_sex](https://forums.speedlife.net/u/zee_oh_sex)
#### Post date: [January 26, 2010, 6:40pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/74 "2010-01-26T18:40:39Z")
^^ok hater, what do YOU have?
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### Author:  [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)
#### Post date: [January 26, 2010, 6:46pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/75 "2010-01-26T18:46:09Z")
> [@WNY Autocross 5/6 NCCC](https://forums.speedlife.net/t/wny-autocross-5-6-nccc/28538/88):
>
> I wouldnt say much more expensive. There are thousands of trucks built every year and these motors are much more plentiful than LT1s and Vortecs. The low CR makes it even better cause you can run 87 now and 20psi boost later. The LT1 is still a great engine but its becoming less practical every day
>
> LT1 - 92-97
> 350 Vortec or L31 96-01
> LSX - 99-present
the drivetrain may be cheap but a lot of the supporting needs arent ,lsx swap headers are coin so is a runnin system if goin carb and so on ,woth it yes at times ,but fluffer is just lookin for fun so lets get this deal goin lololol
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### Author:  [@88slowmarro](https://forums.speedlife.net/u/88slowmarro)
#### Post date: [January 26, 2010, 6:46pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/76 "2010-01-26T18:46:48Z")
> [@2007 MB SLR Roadster](https://forums.speedlife.net/t/2007-mb-slr-roadster/28780/3):
>
> Pfft lt1’s are dogs compared to the ls platform. The ignition system is complete shit and they fall off top end like theres no tomorrow
mine isnt as bad down low as it used to be ,and now my ignition is good :lol
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### Author:  [@zee\_oh\_sex](https://forums.speedlife.net/u/zee_oh_sex)
#### Post date: [January 26, 2010, 7:02pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/77 "2010-01-26T19:02:16Z")
what sean is failing to realize that when he goes carb, the lt1 ignition system becomes highly modified. and you can make it muucchh muchh stronger. and falling off topend is easy to fix with gearing, a cam, etc…
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### Author:  [@plaf713](https://forums.speedlife.net/u/plaf713)
#### Post date: [January 26, 2010, 8:48pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/78 "2010-01-26T20:48:45Z")
> [@\*\*\*\*\*Official: Mighty Meet Thread\*\*\*\*\*](https://forums.speedlife.net/t/official-mighty-meet-thread/10918/1803):
>
> the lt1 has a horrible ignition and seein as fluffy is the way he is ,he should go to a carb setup seein as its easier to maintain and tune along with cost issues .that bein said a carb conversion on a lt1 will hold the same power levels but gain a smoother trq band with 30 more lb feet of trq in the mid to top on a othwise stock motor
oh yeah and its costs a lot
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### Author:  [@plaf713](https://forums.speedlife.net/u/plaf713)
#### Post date: [January 26, 2010, 8:50pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/79 "2010-01-26T20:50:08Z")
> [@WNY Autocross 5/6 NCCC](https://forums.speedlife.net/t/wny-autocross-5-6-nccc/28538/88):
>
> I wouldnt say much more expensive. There are thousands of trucks built every year and these motors are much more plentiful than LT1s and Vortecs. The low CR makes it even better cause you can run 87 now and 20psi boost later. The LT1 is still a great engine but its becoming less practical every day
>
> LT1 - 92-97
> 350 Vortec or L31 96-01
> LSX - 99-present
lt1 does not have low compression, hence why it went to a reverse cooling system in hopes to run more compression, i believe its 10:1 cr
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### Author:  [@ReDevil](https://forums.speedlife.net/u/ReDevil)
#### Post date: [January 26, 2010, 9:06pm UTC](https://forums.speedlife.net/t/4-to-8-swap/249920/80 "2010-01-26T21:06:06Z")
This thread sucks.
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