Another what 370, 408, or 427 for boost thread
Another what 370, 408, or 427 for boost thread Goal= 1000+ RWHP@around 20lbs of boost
streetable, idle well in traffic, not be so loud as to scare everyone off.
using either 70 mm or 61 mm twins
What should I get a 370, 408, or 427??
Is money an issue, yes and no; yes it is an issue as I have a total budget of $7,000 for a shortblock and no I do have the money to spend if I cant get there on the 370.
Any help would be great.
streetable, idle well in traffic, not be so loud as to scare everyone off.
using either 70 mm or 61 mm twins
What should I get a 370, 408, or 427??
Is money an issue, yes and no; yes it is an issue as I have a total budget of $7,000 for a shortblock and no I do have the money to spend if I cant get there on the 370.
Any help would be great.
370?? Would anyone call me dumb if I wanted to do this build with a smaller engine than a 408? As in everyone is doing the 408 thing, could it be possible with a built 370?
TECH Enthusiast
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Originally Posted by ColePatWithem
Would anyone call me dumb if I wanted to do this build with a smaller engine than a 408? As in everyone is doing the 408 thing, could it be possible with a built 370?
Ttt Will this work?
370 decked and honed, with a stock stroke Lunati Forged crank, forged internals, turbo pistons, hell fire rings, turbo cam 23x, AFR 225's, Twin T70 turbos? Would the cam be too big? I could probably have a shortblock built by a sponser on here. As far as power goals, would this get over 1000 RWHP though?
370 decked and honed, with a stock stroke Lunati Forged crank, forged internals, turbo pistons, hell fire rings, turbo cam 23x, AFR 225's, Twin T70 turbos? Would the cam be too big? I could probably have a shortblock built by a sponser on here. As far as power goals, would this get over 1000 RWHP though?
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1000rwhp should be possible with any of the combo's listed. The 370 will do it without problem. Lunati crank is a good choice, steel main caps would be good insurance at the power level your working with.
Kurt
Kurt
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Staging Lane
Joined: Oct 2005
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Going with the smaller cubes will create more turbo lag when running the same sized turbo's. Going with a shorter stroke should allow you to run higher RPM though, if the rest of the engine will take it. The shorter the stroke, the better the rod ratio and it will allow you to rev higher because piston speeds will stay lower. If you want your power up top, then go with the smaller engine, if you want the power at lower RPM then go with more cubes. A longer stroke will create more torque.
Well all the combos you state will do 1000rwhp like everyone has stated. But I see you say streetable. The most streetable combo would be the 408 with twin 61's and still keep within a decent budget. Lag will be minimal, tons of boost won't be needed to reach your #'s, and on pump gas you will make more power then the rest of the combos other then if you go 427.
408 OK I think the 370 with twin 70's would be a good choice as well, won't they give me tons of torque donw low as well as top end? I say that to say this, I already had a 370 block and am having a local shop deck and hone it and torque plate it and cap it so then I guess I can just send it to a shop to finish out the internals and heads.
New Setup to Come: 370 all forged internal, Twin T70's, AFR 225's, as far as engine and TT wise, just have to find a shop to do the TT setup now, I take it Stenod or high flow will have on eout in a few months or less, any idea on which could do it faster?
New Setup to Come: 370 all forged internal, Twin T70's, AFR 225's, as far as engine and TT wise, just have to find a shop to do the TT setup now, I take it Stenod or high flow will have on eout in a few months or less, any idea on which could do it faster?
Staging Lane
Joined: Oct 2005
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You aren't going to get much power down low becaue those baby's won't be spooled until at least 4k. Those are some pretty big turbo's. I would look at using 67's instead. I saw a single 67 put out 697 whp on the dyno.
TECH Enthusiast
Joined: Nov 2003
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Originally Posted by ColePatWithem
OK I think the 370 with twin 70's would be a good choice as well, won't they give me tons of torque donw low as well as top end? I say that to say this, I already had a 370 block and am having a local shop deck and hone it and torque plate it and cap it so then I guess I can just send it to a shop to finish out the internals and heads.
New Setup to Come: 370 all forged internal, Twin T70's, AFR 225's, as far as engine and TT wise, just have to find a shop to do the TT setup now, I take it Stenod or high flow will have on eout in a few months or less, any idea on which could do it faster?
New Setup to Come: 370 all forged internal, Twin T70's, AFR 225's, as far as engine and TT wise, just have to find a shop to do the TT setup now, I take it Stenod or high flow will have on eout in a few months or less, any idea on which could do it faster?
SHORTER stroke is more reliable there is no 
about it
and yes if you HAVE to buy a new forged crank then go 408
but if you wanna save 1000 or more bucks stay with the stock crank and just make 800...also if you read his post 1000rwhp and streetable are in the same sentence. like your gonna be driving around on the street with 1000hp anyways some of you just have no clue
about itand yes if you HAVE to buy a new forged crank then go 408
but if you wanna save 1000 or more bucks stay with the stock crank and just make 800...also if you read his post 1000rwhp and streetable are in the same sentence. like your gonna be driving around on the street with 1000hp anyways
some of you just have no clue You can build a 364ci blower motor that will be more reliable in the high RPM range. Just use a 6.0L iron block, keep the 4" bore, and use a stock 3.622" stroke crank or an Eagle 3.622" stroke crank. By not boring it out it would handle some more boost and spray, as long as the internals are up to par. With $7000, you can build a pretty badass short-block.
Originally Posted by Paulz2820
SHORTER stroke is more reliable there is no about it
and yes if you HAVE to buy a new forged crank then go 408
but if you wanna save 1000 or more bucks stay with the stock crank and just make 800...also if you read his post 1000rwhp and streetable are in the same sentence. like your gonna be driving around on the street with 1000hp anyways some of you just have no clue
about itand yes if you HAVE to buy a new forged crank then go 408
but if you wanna save 1000 or more bucks stay with the stock crank and just make 800...also if you read his post 1000rwhp and streetable are in the same sentence. like your gonna be driving around on the street with 1000hp anyways
some of you just have no cluei have tried a 4.8, 6.0 and a 408 all with the same t76 turbo. there is a huge diference with spool time for each motor. the 408 had no lag at all. the 4.8 took several seconds to spool. the 6.0 had some lag. lag is no fun. more cubes = less lag. now i am running a pt88 turbo. there is some lag again.