402 vs 408
Thread Starter
Teching In
Joined: Sep 2004
Posts: 17
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402 vs 408 Hello all I was looking at texas speed website, and was wondering what the differnce was between the 402 and the 408 beside displacement and iron vs alluminum, and the short block vs long block.
Im looking to go NA, but it would be nice maybe way later down the road to boost it, but who knows.
Anyways I would like to palce an order for one of these fine engines, as well as a patriot stage III head, and an ls6 intake manifold.
Any other suggetions for my buildup?
Stock everything so far.............
98 ws6
Im looking to go NA, but it would be nice maybe way later down the road to boost it, but who knows.
Anyways I would like to palce an order for one of these fine engines, as well as a patriot stage III head, and an ls6 intake manifold.
Any other suggetions for my buildup?
Stock everything so far.............
98 ws6
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
The difference is bore size, 4.030 Vs 4.060 (alum>iron), stoke is the same at 4.00
Fast 90/90, headers (preferably 1 7/8 or stepped, clutch and differential (stock won't hold long with that kind of power), of course tuning.
Fast 90/90, headers (preferably 1 7/8 or stepped, clutch and differential (stock won't hold long with that kind of power), of course tuning.
The advantage that I see would be that a 408 will allow you to use a LS7 Head. What is the weight savings with the LS2 block over the LQ4? That would be one that I would have to measure. I know it is like 70lb between the factory 5.7 and the LQ4.
The advantage that I see would be that a 408 will allow you to use a LS7 Head. What is the weight savings with the LS2 block over the LQ4? That would be one that I would have to measure. I know it is like 70lb between the factory 5.7 and the LQ4.
Originally Posted by n2o
The advantage that I see would be that a 408 will allow you to use a LS7 Head. What is the weight savings with the LS2 block over the LQ4? That would be one that I would have to measure. I know it is like 70lb between the factory 5.7 and the LQ4.
Originally Posted by PREDATOR-Z
The difference is bore size, 4.030 Vs 4.060 (alum>iron), stoke is the same at 4.00
Fast 90/90, headers (preferably 1 7/8 or stepped, clutch and differential (stock won't hold long with that kind of power), of course tuning.
Fast 90/90, headers (preferably 1 7/8 or stepped, clutch and differential (stock won't hold long with that kind of power), of course tuning.
408=4.030 bore
414=4.060 bore
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I went with a 408 iron recently and Im planning to spray it in the near future. Also, you will probaly have to decide how soon you will do the turbo or stay NA, just because of the compression. Unless you just want to stay down a few HP's for a while.
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Originally Posted by DONAIMIAN
402=4.000 bore
408=4.030 bore
414=4.060 bore
408=4.030 bore
414=4.060 bore
