SACRILEGE

[924nutter]

For those who are interested, I am about to perform an act of supreme sacrilege within the next few weeks and modify a Subaru part to fit on my 924Turbo.
I have bought the cheapest WRX stock intercooler from you know where and with few modifications I think I can make it fit the 924T, without a lot of trouble. The core is nice and narrow allowing room the make a bespoke connector to the 924 throttle body and I think that if I remove the lower section of the pressure duct as well as the top section I can connect to the Subaru inlet quite easily too. I may have to machine the oil filler cap off and weld in a blanking plate, but don't worry there are plenty of other orifices on the 924 T than will allow oil to be poured into the sump. Luckily I have a non-vented bonnet in the garage on another "spares only" 924 n/a, which I will be able to cut away to clear the intercooler and fit a bonnet scoop to. This installation will be in addition to the engine and turbo rebuild so when it is finished it could be a nipply little beast.

 

[geoff Ives]

I hope that you will keep a photgraphic record and write an article about it.

 

[Bertroex]

This is really really interesting... Series 2 or series 1 or doesnt it matter? Also, engine rebuild? Were you the chap who got the pistons etc on Ebay 8 months ago to enlarge it to 2.2?

Bert

 

[924nutter]

I am that soldier. In point of fact the increase in capacity will be small, some 23 cc, from 1984cc to 2007 and a bit cc. I have a line on a modifed camshaft specifically designed for the turbo with less overlap to reduce the dreaded blowthrough. Instead of straining the turbo to its limit I inted to skim the block by as little as 0.002". This should raise the CR to from 8.5:1 to about 8.75:1, and give the same overall effect as raising the boost but accentuate the off boost performance too. The scooby intercooler has about the same cooling area but the core is about 10 mm deeper than the CGT. Also I dont plan to run it on 95 ron. My Local garage sells 99 ron and also 99 ron leaded if I want to go for the ultimate, but I am satisfied that with nice wide valve seats, new water pump and radiator, detonation wont be an issue at the new but still relatively low CR. The 924t is designed not to pink on 98 ron without the cooler, after all. I am quietly optimistic about making at least 210. A bog 924t with a water charge cooler fitted by 930 motorsport made 196 without any other changes. If I don't get at least 14 ponies from the cam that will be a waste of $415. Factor in 5 more from the slight raise in cr and marginal capacity increase and 215 could be on the cards. Or in other word a scant 5 bhp less than the 220 horse 944t in a 924 body shell. Ye gods!.

Photy grafs, what are they?

 

[Bertroex]

John (it is john, isnt it?)

Belton did a few 931 conversions and I seem to remember that the S1 was faster than the s2. I bought last year that dark green one from the Isle of Wight: turns out it had a seized engine.

Bit of a shame and at the moment umming and ah-ing about what to do with it: either fix it up and spending loads to obtain a hot 931 S1 or get a MOT'd and cosmetically nice cared for 931. Looked a bit left right and centre for a good one: missed juuuuuust on ebay the 1981 motorshow s2 (silver grey/antracite, 928 wheels, black leather) and all the rest what is advertised somehow doesnt do it.

Dilemma dilemma....


Bert

 

[924nutter]

We need to have a chat. Languishing in my drive at my property, as opposed to the property owned by my wife where we reside, I have a nother running 924t that is in need of a turbocharger judging by the volumes of smoke at idle and the inability of the turbo to maintain 5psi over 4,000. It hasnt run for about 18 months but if I know my 924s it'll fire up. I have recipts for £3600 for a engine and turbo rebuild in 1997, and it was re-pistoned and overhauled again in about 2003 iirc. It would be best suited as a donor car, with the cracking gearbox that I put in it, and the retrimmed seats and BoxsterS 16 inch wheels.
The 170 bhp turbo was half a second quicker to 60 on acount of its larger turbo, running 0.7 bar on an 8.0:1 cr against the later car's 0.63/ 8.5:1, which gave it a latge slug of mid range torque. however it was like driving a 944t with lots of lag as the big turbo spooled up. Overall though the extra seven brake gave the later car 3 mph alegedly taking its top whack to 143.

 

[Bertroex]

ORIGINAL: 924nutter

We need to have a chat.

Last time someone said that to me, we ended up leaving at 3AM and getting the hands together for a 911R replica.[]

Caveat caveat old bean, but I'm interested!!

Bert

 

[924nutter]

Berto, I replied to your PM but your defaults are not set up to recieve PM replies.

 

[924nutter]

I have had the cam cover up on the milling machine and have removed the parallel section of oil filler orifice. Next stage ( tomorrow, all being well) will be to tilt the machine head over to 40degrees to machine off at the other angle. The scooby cooler will protrude halfway past the oil filler, so I am machining it off flush, blanking it with a plate and relocating it.

 

[Bertroex]

John,

sorry to hear that you weren't successfull in contacting me. Any chance to send me an email with perhaps a contact number on bertroexAThotmailDOTcom

Thanks very much.


Bert

 

[924nutter]

Latest! I have ordered the "hot" cam from Integral Cams
at 0.015" lift the figures are
inlet opens 13 deg earlier and has 9 deg more duration
exh opens 6 deg earlier and has 2 deg more duration
lift is up to 0.500" inlet (0.472") and 0.478" exh(0.472")

 

[924nutter]

Well them boys at Integral move quickly. The new cam is already somewhere between Minnesota and here. 6 days, wow.

 

[Bass GT3]

You think that is sacrilege!! My 931 is currently running 393bhp at the crank
However, i think the only stock item is the block and the, er, erm, nope, just the block actually. When finished, she should be at 410-420 on race fuel, with a Garrett GT2871 turbo. All this is going to be shoehorned into a newly prepared shell, build to better than GTR specs including bodykit.

Steve

 

[Bertroex]

Surprised you havent been banned from PCGB really []

Do tell us more, you tease!!

Bert

 

[Bass GT3]

I've been trying to upload pics, but their size is too big. But in short, it is a 2 ltr block, Arrow rods, Woosner Teflon pistons, ali flywheel, AP 6 paddle clutch, dry sump oil system on engine, 4 branch exhaust manifold. Turbo relocated to front of engine transverse, Jenvey Throttle bodies, 8 Injectors, Integral Cam, Franco cam gear, 944 intercooler vented through bonnet, custom plenum system, Pectel SQ6 ECU, 968 6 speed gearbox, ZF 40/60 plate LSD, 944 ali rear suspension, JRZ coilover suspension, torsion bars removed. There's a host more, but i am building a new seam welded, caged shell, with GTR bodywork ect. For more info, check out 924.org and search for Bass GT.

Steve

 

[924nutter]

Yes Steve but I want mine as a daily driver. With my intercooler mounted over the engine I will have a very driveable car with out a lot of lag, which was always the plan. I am not building an out and out racer, but thanks for the information. Send pics soon. Try using your photoshop package to resample the size of the image

 

[Bass GT3]

Mine's a daily driver[] I just drive it on the Speed Championship days!!! All joking aside, if you want any info/ suppliers for these engines, i have built up a wealth of info and knowledge doing mine. I've also found a good stream of parts that do work with theses motors. Want to upgrade your head studs?? I know a set by ARP that are a direct replacement[] Much better than stock, especially if you are going to up the boost. Want to stop cylinder #4 getting hotter than the rest and detonating?? I've found the cure!!!! And as for your IC location, try not to place too far forward in the engine bay. If you go further forward than the stock GT scoop location, the area is actually the lowest pressure point on the bonnet, so you will not be getting much ram air. I have the aero drawings if it helps you, with relative pressure differentials across the body. Invaluable for location high or low pressure spots.

Steve

 

[924nutter]

Thanks for that but no worries the intercooler is going in almost the standard location, but is 30mm longer. I have modified my cam cover to blank off the oil filler recess and substitue a small flange and stub pipe under the IC capped with a 944 filler cap. I have the Porscheshop replica scoop which will be fitted to a non vented bonnet (hood) as the bonnet (hood) looks silly with the vent and scoop, and it retains the std turbo bonnet (hood) in unmolested condition

 

[924nutter]

I recieved that friendly letter form parcel force telling me that I need to pay £43.96 import duty on the cam, then it will be delivered. Good oh!.