250 hp for $1500 with adapter any one?

[jonnyspatter]

Its a popular conversion over here, check out www.tsrdragracers.co.uk or www.ricola.co.uk for details.

I'd like to do it to mine, but I'm undecided. Its either that or a turbo'd 1776 with EFI!

[ricola]

You know you want to...

[lazylongboarder]

Originally Posted by jonnyspatter

Its a popular conversion over here, check out www.tsrdragracers.co.uk or www.ricola.co.uk for details.

I'd like to do it to mine, but I'm undecided. Its either that or a turbo'd 1776 with EFI!

I hate to burst your bubble but that is definately comparing apples to oranges.

A turbo'd 1776 will get about 180 hp TOPS. And thats being generous. The EJ20T has 227 hp stock with cats and all of the emission crap and stock ecu. With a free flow exhaust, larger fuel pump, injectors and EMS...340 hp is not uncommon according to several tuners (Danzio,Xcceleration,Crawford,Cobb).

The stock internals go to **** once you get rambuctious and turn the boost to 20 lbs.. The rods are the first to go on average at 405 hp, then the wrist pins at 415 hp, then the pistons start getting holes blown in them at 420 hp. I've seen an EJ20TT block with billet "H" beam rods and forged pistons with the stock block and crank pull a 660 hp dyno run. Obviously on 112 race gas, but it did it. 18 lbs is the limit with still being some what safe. Most guys will have the boost set to 16 lbs and run it on race gas to prevent detonation and be safe.

Always be prepared to spend more than what you planned, just so you don't get sticker shock.

The adapter alone to my G50 is $772! To a 901/915 is $410. The only reason why i'm going with such an exotic tranny is cause it's the only one that'll handle 800 ft. lbs of torque. If anyone knows of another strong tranny with LSD, please let me know. I don't want to drop $4500 into a tranny then find out there was something hidden out there that was cheaper and lighter.

[73notch]

curious why you are doing a single turbo conversion to a twin turbo block. when i looked into it a while back, the blocks were the same, only difference was the twin turbo had a higher compression ratio.

[ricola]

From what I've read earlier twin turbo blocks were closed deck, just an easy way to make sure you get a CDB when building a high bhp engine!
Rich

[73notch]

the same generation ej20g's (single turbo) ones are closed deck also.

[lazylongboarder]

Actually, the only closed deck block that subaru ever produced was the EJ22, a naturally aspirated 2.2 liter motor put in the legacy's in the early 90's. The STi now has a semi closed deck block. Both the EJ20T and EJ20TT have an open deck block. No 2.0 or 2.5 liter deck has ever been closed from the factory. Not even the Forrester 2.5 X... 330 hp from the factory.

When I make my fire-breather i'll use either the STi block or the EJ22 block, sleeve it, Forged rods, billet pistons, cams, valves, retainers, port and polish, T3/T4, 33 psi, and no muffler.

When the EJ22 block is sleeved the block will be able to handle 50 psi! All I would have to worry about is the crank snapping in two and finding rods, wristpins, rings, pistons, valves, cams, retainers...Hell every thing breaks at those pressure levels. The EJ20T and TT block will handle 400 hp stock, that'll be fine for a while. 400 hp in a bug is plenty if you ask me.

The only difference between the EJ20T and the EJ20TT is that the heads are differant. The valves are slightly larger and the cams are a little more aggresive. The shortblocks on these two motors are identical, hence an identical compression ratio.

The reason why i'm going with a single turbo conversion is that the header is heavier than a sandrail header and controlling boost is much easier as well as plumbing for a high capacity intercooler. But if you are looking for an easy 300 hp on a budget, The EJ20T series motors can't be beat. I have to use a sandrail style header because of the rear exiting (to the motor, forwards on a rear engined application) stock style header based on the EJ20T will interfere with the cross member of the 993's rear suspension that i'm putting on.

[ricola]

Originally Posted by lazylongboarder

Actually, the only closed deck block that subaru ever produced was the EJ22, a naturally aspirated 2.2 liter motor put in the legacy's in the early 90's. The STi now has a semi closed deck block. Both the EJ20T and EJ20TT have an open deck block. No 2.0 or 2.5 liter deck has ever been closed from the factory. Not even the Forrester 2.5 X... 330 hp from the factory.

that conflicts with everything I have ever read on the EJ20T, I have seen many pictures of closed deck EJ20's and from what I've read my EJ20t RA is definitely CDB

Rich