building my block

shorty5198 · 10-30-2006, 07:11 PM

I have been playing with the idea of building my block and going with the GT35R. I would go with cobb pistons and rods. New rod and main bearings. I know i would have to get my crank rebalanced and i was thinking about a small bore on the engine to start out with clean cyliders. Other than this, anything else that i need to take into consideration? I know i'm going to have to really keep up on oil changes and tranny fluid. Any other things that i will really have to keep a close eye on?

**AR Fab** · 10-30-2006, 07:15 PM

With a small bore to clean the cylinders up you will lower the power you can go with it...since you will be making the sleeve slightly thinner by .020" or .5mm. The stock sleeve is already pretty thin and weak since it is a grey iron casted sleeve.....What are your goals?

Howard

shorty5198 · 10-30-2006, 07:30 PM

my goal is 500 to the wheels. I'm gunna run alcohol injection as well. What about cobbs stage 3 street block? I've been looking into their blocks and they look good

eatV8 · 10-30-2006, 08:03 PM

Cobbs blocks are great, as to is AR Fab blocks and a couple of others.

**AR Fab** · 10-31-2006, 06:32 AM

Quote:

Originally Posted by shorty5198

my goal is 500 to the wheels. I'm gunna run alcohol injection as well. What about cobbs stage 3 street block? I've been looking into their blocks and they look good

knowing how thick the cylinder walls are on a subie block I would make sure your buying a new block instead of reusing yours. We offer a core discount for your old ones or I would suggest Sleeving. Not only does sleeving allow for added strength for more power it also keeps its shape during high cylinder pressures so you will get better ring sealing which = more power than a stock sleeve....

Something we have noticed....Honda blocks have a thicker cast cylinder than a Subie but its rare that you see a Turbo Honda running more than 450whp on stock sleeves....one reason is the stock Honda Knock sensor is better off in the trash can.....the other is people have been sleeving them for 8 yrs now and they know the advantages of aftermarket sleeves....its a matter of time before everyones first engine mod is sleeving in the Subie comunity. The cost value of a Honda sleeving job 8 yrs ago was over $1500 now the average is $950.....some day the Subies will be this low too...but since there are only a small handful of engine shops that have the capability the cost is high....

Anyone can offer a 500whp package utilizing a new short block from Suby....add in some cheap H-Beam rods and a replacement forged piston that uses the factory wrist pin locks and factory rings.....but as many have learned this could lead to incorrect piston-wall clearances or no ring sealing due to improper ring installation on the piston. These shops are not engine shops guys....we call them "Parts Hanging Shops" and they have no clue what they are doing they just know its worked a few times before and decided to sell the package and do not care about you and what you are doing. We dont really have a set package for engines and we update what we do for engine builds on a daily basis. I have engineered, yes you read this correct, our own piston for the Suby engine to help remedy common problems that are associated with built Suby engines. We sleeve our blocks in-house. We balance our rotating assemblies in-house. We have had bearings made to my specifications also. So when our clients come to us for an engine build we will taylor it for them. We are even working with Dan at DPR to create our very own CNC ported head profiles to work with our engine setups as well. As much as I dont like the East to West coast distance between us, he is the only person I would trust to do what I am asking for rather then just jamming some sanding rolls on a die grinder and calling it ported! I can build any engine combo comparable to any other shop for the same or slightly better pricing, thats easy, but when you want something thats well engineered for you....there are only a few that can do this.... Im on that list!

Howard

eatV8 · 10-31-2006, 11:44 AM

^ sorry for going a little off topic here, but RE: strenth, it will be interesting to see how Subarus new Diesel block is. This could possibly be the new block to build an engine from considering the cylinder pressures etc produced within a diesel engine. Of course assuming the gas cylinder heads etc all mate up.

**AR Fab** · 10-31-2006, 02:31 PM

Quote:

Originally Posted by eatV8

^ sorry for going a little off topic here, but RE: strenth, it will be interesting to see how Subarus new Diesel block is. This could possibly be the new block to build an engine from considering the cylinder pressures etc produced within a diesel engine. Of course assuming the gas cylinder heads etc all mate up.

im sure the block will be iron

10-30-2006, 07:11 PM	#1
shorty5198 Junior STI Driver Car: 2004 STi Fav Mod: Ohlins Sportlines Location: Minnetonka, MN Posts: 63 Join Date: Oct 2006 Trader Rating: (0)	building my block I have been playing with the idea of building my block and going with the GT35R. I would go with cobb pistons and rods. New rod and main bearings. I know i would have to get my crank rebalanced and i was thinking about a small bore on the engine to start out with clean cyliders. Other than this, anything else that i need to take into consideration? I know i'm going to have to really keep up on oil changes and tranny fluid. Any other things that i will really have to keep a close eye on? This ad is not endorsed by this member. Please register or login to hide this ad.

10-30-2006, 07:15 PM	#2
AR Fab Authorized Vendor Car: 02 WRX 675whp 584ftt Fav Mod: 8 1600cc injectors Location: Winchester VA Posts: 479 Join Date: Jan 2006 Trader Rating: (0)	With a small bore to clean the cylinders up you will lower the power you can go with it...since you will be making the sleeve slightly thinner by .020" or .5mm. The stock sleeve is already pretty thin and weak since it is a grey iron casted sleeve.....What are your goals? Howard

10-30-2006, 07:30 PM	#3
shorty5198 Junior STI Driver Car: 2004 STi Fav Mod: Ohlins Sportlines Location: Minnetonka, MN Posts: 63 Join Date: Oct 2006 Trader Rating: (0)	my goal is 500 to the wheels. I'm gunna run alcohol injection as well. What about cobbs stage 3 street block? I've been looking into their blocks and they look good

10-30-2006, 08:03 PM	#4
eatV8 retired mod Car: 99 WRX STi V5 Fav Mod: JDM Air Freshener Location: Brisbane, Australia Posts: 3,855 Join Date: Apr 2003 Trader Rating: (0)	Cobbs blocks are great, as to is AR Fab blocks and a couple of others.

10-31-2006, 11:44 AM	#6
eatV8 retired mod Car: 99 WRX STi V5 Fav Mod: JDM Air Freshener Location: Brisbane, Australia Posts: 3,855 Join Date: Apr 2003 Trader Rating: (0)	^ sorry for going a little off topic here, but RE: strenth, it will be interesting to see how Subarus new Diesel block is. This could possibly be the new block to build an engine from considering the cylinder pressures etc produced within a diesel engine. Of course assuming the gas cylinder heads etc all mate up.