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Old 01-26-2004, 11:36 PM   #51
MJU1983
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Quote:
Originally posted by spiralsmurf
the usdm sti does not have forged pistons, this was a known fact long ago.
Thanks for the newsflash Tom Brokaw.
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Old 01-26-2004, 11:41 PM   #52
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Quote:
Originally posted by StiDreams
Now it looks like no new STi have forged pistons. I remember reading somewhere that the WRC cars also switch to the HE pistons. Is that true?
I think it was talked about in the other thread... but I dont remember.
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Old 01-27-2004, 12:21 AM   #53
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Quote:
Originally posted by BoostdBoxer
It dont matter to me I am hving my Block bulletproofed with Ductile Iron T-Sleeves in the next few months so I will be able to run 40 PSI of boost. Oh yeah my pistons and Rods are all going to be top dollar forged materials. And I want to get a new crankshaft but I am not sure about that one yet. I have been saving forever to get this done,

With that said and done I better save 10,000 more dollars so I can replace my tranny once I put 40 PSI of boosted energy through LMAO


realistically I will never run that much maybe 25-30 MAx but I want to have it built so it can take 60 before exploding and killing every living thing in a 12 mile radius.
yes you sound like me, you have a new friend
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Old 01-27-2004, 12:18 PM   #54
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What heads will be used on this engine? What will the CR be?
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Old 01-27-2004, 01:09 PM   #55
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Quote:
Originally posted by sub666
What heads will be used on this engine? What will the CR be?
WRX Heads, 8.6:1 compression ratio.

-Mike
www.axispowerracing.net
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Old 01-27-2004, 01:51 PM   #56
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Quote:
Originally posted by eightballrj
Also, I am in no way questioning CP's analysis of the piston. But, what makes them say definately that it is not a forged part. I just dont know how you can look at it and tell. I would like to know for future reference if anyone or Quirt himself can let me in on that knowledge. The pursuit of knowledge never stops, haha.


RJ
I think you are thinking of two different people.

CP = http://www.cppistons.com/

"Quirt" I don't know who that is.

-Mike
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Old 01-27-2004, 01:54 PM   #57
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[Tom Brokaw mode on] Quirt Crawford is the owner of Crawford Performance in Northern California. They are the machine shop that does much of the work for I-Speed.[Tom Brokaw mode off]
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Old 01-27-2004, 01:55 PM   #58
MJU1983
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Quote:
Originally posted by spiralsmurf
[Tom Brokaw mode on] Quirt Crawford is the owner of Crawford Performance in Northern California. They are the machine shop that does much of the work for I-Speed.[Tom Brokaw mode off]
LOL, you know I was joking with the Brokaw comment

Thanks for the info.

-Mike
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Old 01-27-2004, 02:05 PM   #59
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yeah i know. ask ron for me if you guys have an usdm wrx motors for sale.

-dan
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Old 01-27-2004, 02:07 PM   #60
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Quote:
Originally posted by spiralsmurf
yeah i know. ask ron for me if you guys have an usdm wrx motors for sale.

-dan
No USDM, but I think we have a few JDM shortblocks sitting around our other shop... Lemme know!

-Mike
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Old 01-27-2004, 02:07 PM   #61
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They will be getting one in about a few days or so(well shortblock at least) with probably a gone piston, haha.

RJ

Last edited by eightballrj; 01-27-2004 at 02:37 PM.
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Old 01-27-2004, 02:30 PM   #62
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rj - is your shortblock gonna be for sale?

mike you guys have two shops now? Wow Ron has really progressed out there. Much better than he was doing in LA. His old shop used to be around the corner from my house....man it would have been cool if he stayed here and did all the same stuff.
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Old 01-27-2004, 04:00 PM   #63
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Quote:
Originally posted by spiralsmurf
rj - is your shortblock gonna be for sale?

mike you guys have two shops now? Wow Ron has really progressed out there. Much better than he was doing in LA. His old shop used to be around the corner from my house....man it would have been cool if he stayed here and did all the same stuff.
The shop in downtown St Louis is where we still do all of our engine work, fabrication and assembly.

The other shop is located 18 miles from downtown St Louis, and is in Belleville, IL. Currently, it only houses our Dyno. But soon enough we will be moved over there for good.

-Mike
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Old 01-27-2004, 04:50 PM   #64
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move back to LA....please...
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Old 01-27-2004, 04:55 PM   #65
MJU1983
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Quote:
Originally posted by spiralsmurf
move back to LA....please...
Would if I could... Doubt Ron will tho. All settled down withe wife and baby

-mike
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Old 01-27-2004, 05:01 PM   #66
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oh man, he had a baby. wow. how do you guys get your shipments into that area of the country, do they come from NY first?
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Old 01-27-2004, 05:03 PM   #67
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Quote:
Originally posted by spiralsmurf
oh man, he had a baby. wow. how do you guys get your shipments into that area of the country, do they come from NY first?
STi stuff? We rarely get anything anymore due to shipping problems and damaged goods in the past. However, we can locate items if the need arises. We get our stuff direct from Japan.

-Mike
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Old 01-27-2004, 09:11 PM   #68
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Yeah, you guys were getting a lot of sti stuff for a while. I know it comes direct from japan, but I mean it comes in containers right? So it's originally on a boat.
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Old 01-28-2004, 11:11 AM   #69
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hey everyone.

this is quite possible the best thread ever. could be because i checked out proven power bragging first (srt evo sti and a whole bunch of bench racers ) i think it's the great photos of the block!

MJU1983 i have a question for you.

do you have pics of the heads and cams and all that good stuff?

i'm having trouble picturing the ACVS from the drawings in the shop manual. i know you're busy, just a few pics would be great.

and since this thread is full of specialists, would anyone like to enlighten me on the feasibility/availability of roller-cams for the sti (usdm v8)?

thanks again for the great info!

take it easy all
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Old 01-28-2004, 12:09 PM   #70
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hay lets build up a h6 motor.lots of power waiting
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Old 01-28-2004, 02:11 PM   #71
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Quote:
Originally posted by ____
hey everyone.

this is quite possible the best thread ever. could be because i checked out proven power bragging first (srt evo sti and a whole bunch of bench racers ) i think it's the great photos of the block!

MJU1983 i have a question for you.

do you have pics of the heads and cams and all that good stuff?

i'm having trouble picturing the ACVS from the drawings in the shop manual. i know you're busy, just a few pics would be great.

and since this thread is full of specialists, would anyone like to enlighten me on the feasibility/availability of roller-cams for the sti (usdm v8)?

thanks again for the great info!

take it easy all
Well I dont know about roller-cams, never heard of anyone useing them around here...

Heres a thread with some the STi head info and a lot of talka bout port sizes...

http://forums.nasioc.com/forums/show...light=cam+info

And heres the cam info thread...
http://forums.nasioc.com/forums/show...light=cam+info

and I think I posted this before but heres the old thread on the block...

http://forums.nasioc.com/forums/show...light=cam+info
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Old 01-28-2004, 02:32 PM   #72
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thanks!

i ran a search on here and only came up with 2 results

next time i'll remember to change the date range of the returned posts.

great links... lots of brain candy

thanks again

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Old 01-28-2004, 03:05 PM   #73
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Mike. Thanks for posting the pics. The V8 JDM's do in fact use Cast pistons. They are supposed to be stronger then the forged pistons and I know alot of you dont want to believe that but I am very comfortable with the new Castings. One easy way to tell if its a cast or forging is to look at the bottom of the piston. The cast pistons will always have the Cross hatch lines while the forged pistons will be smooth.

The real reason (IMHO) for the switch to Castings is for emissions and longevity. The V7 motors used Forged pistons and because of cold start emissions had to run a SUPER tight wall clearance of 10-12 ten thousands. Probably also to stop the knock on cold start. The problem with this is that as the piston takes on heat it expands and the piston runs tight in the bore creating heat and friction. Eventually the engine makes its own clearance and you get a knock. Ask Jeff Sponaugle about that one. Many Japanese race and rally teams that use V7 engines pull them down and machine the bores slightly for more clearance. This issue is solved with the cast pistons.

Cya




CT
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Old 01-29-2004, 02:23 AM   #74
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Impreza WRX STi Turbo upgrade on USDM 2.5

Hi,
Great Pics and Info -
I purchased a 2004 STI engine with 50 miles on it and I'm looking to upgrade the turbo with a Turbonetics T66 and Racegate I have that are sized for a 2500cc.

What do you think is a safe boost level given I want to keep the engine stock. Also do you know of anyone using an aftermarket ECU with a VVT engine?

Thanks
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Old 01-29-2004, 02:29 AM   #75
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Default Re: Turbo upgrade on USDM 2.5

Quote:
Originally posted by fullthrottleguy
Hi,
Great Pics and Info -
I purchased a 2004 STI engine with 50 miles on it and I'm looking to upgrade the turbo with a Turbonetics T66 and Racegate I have that are sized for a 2500cc.

What do you think is a safe boost level given I want to keep the engine stock. Also do you know of anyone using an aftermarket ECU with a VVT engine?

Thanks
VVT, you mean the toyota engine?
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