Should I rebuild & modify 7 bolt or do a 6 bolt swap? 400HP Goal

[ninja07]

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I have a 95 tsi awd. My engine is fine right now but I am going to build an engine that will handle 400 horsepower set and tuned. I will not be turning boost up and down, once I have it tuned to 400hp, that will be the end of it.
My question is do I need to just do the 6 bolt swap,[headache] or can I change the crank with a 99' 2 piece and lose the oil squirters.
Forgive me, I am new to all this, just bought in December. I just want it to be dependable, and safely built. Any suggestions would be helpful, Thanks. Ninja

 

[shredwin]

most people on here are probably gonna tell you to do build up a 6bolt cause of crankwalk on the 7 bolts... I dont think its gonna help if you use a 99 crank.. now if you use the block out of a 99 with the 3 piece thrust bearing then yea that will be a lot better. I have a 95 GSX and used the block out of a 98 Talon TSI( 3 piece thurst bearing) and I havent had any problems of crankwalk or anything...

 

[ninja07]

Yeah, crankwalk is my main concern. I'd hate put all this together and then the reaper come (walkin)

 

[BLINKY619]

ok i would say...6 bolt... 1g rods and 2g pistons... that would be a nice setup...!!

 

[boosted99_420]

people will say use a 6 bolt but Crankwalk is not as common as most people claim it to be maybe 1 in 25000 7 bolts will have it happen. And it can also happen to other cars example: Supras and Miatas. And there have also been 6 bolts crankwalk a clutch not perfectly installed can cause it. So i Vote on rebuid the 7 Bolt. One more thing ive had my GST for 4 years and besides a blown headgasket not much trouble at all. Also when you say 400hp 7 bolt people will not expect it.

(link for supra crankwalk please read this about crank walk ! - Page 3 - Supraforums.com )

Update: Also use 1st gen rods like these guys are saying they are great. If you go 6 bolt though use the Head off of a 2nd gen they flow way better than the 6 bolt head.

7 Bolt FTW!!

 

[kenuwine4g63]

Yea man 1g rods 2g pistons..Its almost like going after market but cheaper and can last just as long and also hold lots of boost. Go for it, thats my next build

 

[shredwin]

or you can do the set up I have... I used a 98 block with split thrust bearing as I metioned on my first post. Picked up a set of evo 9 pistons and rods, had it all balanced, new bearings, arp main studs, and I gotta say Im very pleased with it. I think crankwalk is over rated sometimes, its never happened to me but its your choice on what you want under your hood. good luck though

 

[boosted99_420]

or you can do the set up I have... I used a 98 block with split thrust bearing as I metioned on my first post. Picked up a set of evo 9 pistons and rods, had it all balanced, new bearings, arp main studs, and I gotta say Im very pleased with it. I think crankwalk is over rated sometimes, its never happened to me but its your choice on what you want under your hood. good luck though

yea how much were the Evo 9 rods and pistons.

 

[shredwin]

yea how much were the Evo 9 rods and pistons.

I got lucky on my deal, picked them up for $100 bucks at slowboy racing (when they were in Pa they moved to florida). I was in the process of rebuilding my motor at that time too, Im not sure how much they go for. I believe DSM grave yard sells them now

 

[boosted99_420]

I got lucky on my deal, picked them up for $100 bucks at slowboy racing (when they were in Pa they moved to florida). I was in the process of rebuilding my motor at that time too, Im not sure how much they go for. I believe DSM grave yard sells them now

Ahh ok im may use them when i rebuild mine in the future.....after i buy a new shell

 

[wkmitsu]

Build your 7 bolt and use ACL Race Bearings, it will be fine. You don't need a 6 bolt to get 400 hp reliably.