You've just described it! a S-CDB or a CDB with a 2.1 conversion is working very well for us and our customers. We also have enough S206's out there going very well to be confident in offering that option. You'll certainly get the power you want, and very driveable with it.
We have blocks in stock, if you'd like to give me or Martyn a call on 01752 345880 tomorrow during the day, we can have a chat about it.

 

will do alan!!!!
thanks mate

 

hi allen i done a forged engine rebuild using wiseco piston not so long ago how much would it be for your 2.1 rebuild if i supply cdb, would you still be able to use the pistons i got. thanks

 

The pistons have a different deck height. You'd be better off selling your short block as a running item, and use the cash for the new one!
The cost starts at £2050 inc vat for the built short block, plus the machining cost for the CDB rear thrust, now re-priced at £143.75 inc vat.
The build includes Wiseco pistons, K1 H beam rods, a new 2.5 crank and Cosworth or ACL Race engine bearings.

 

if you had a choice of cdb or semi cdb....which is the best???
also does the crank have to be a 2.5 or can it be a 2.0 one...
why 2.5???

 

If your planning to fit and forget just get a CDB its stronger and better suited to high horsepower.
The 2.1 stroker uses a 2.5 crank and longer rods to achieve the additional 100cc capacity.

 

Can't argue with that, although the S-CDB is good for well over 450 bhp if built properly. The 2.5 crank has a longer stroke, giving a greater swept volume for a given bore. The practical result is better spool up and more torque.

 

im looking at engine upgrades for my gc8 rally car. Have you had any of these engines fitted to a rally car? and any figures with a 34mm restrictor? thanks

 

Hi Christian, you have a PM!

 

Christian
I spoke to Steve Simpson who maps my car , and has quoted figures of about 315hp and 680nm torque going the 2.5 route , as it needs more air at the top end compared to a 2.0 so will loose more boost due to the restrictor , the 2.0 would have slightly higher HP , I'm also running a 34mm restrictor
Cheers Ian

 

anyone know if a 2005 sti type uk has a semi cdb as standard???

 

Yes it does !

 

great stuff martyn!!!!

 

I have just driven back from Enginetuner after picking my stroker short block and reworked heads up and thought ill mention what a great bunch of blokes work there. Im sure they will get fed up with me picking there brains in the coming months when i put it all back together. Happy new year

 

Top bunch of guys Well worth the trip down to Plymouth

 

hi alan, i have a version 2 sti ra with the cdb and was wondering if could rebuild if for me. the heads have a little rattle to them but i think the bottom end is ok. im intrested in the 2.1 stroker with rear thrust conversion forged pistons rods and wot not. im not looking for big power just reliability and piece of mind. if i were to send you two full engines heads an all (cdb's) and recive one in return would this make the price cheaper for me

Dave

 

It's like a Moroccan market in here, we're always ready to deal!
you have PM..

 

Hi Alan
Hows mine coming along ?
Cheers Ian

 

Looking good Ian, it's bored, honed, block prepped and painted, trial assembly completed. Awaiting oil control ring, we found one wrongly boxed with no tab.
On the way to be here for Monday according to supplier.

 

pm replied

1 more question would it be ok to run my standard ecu with pp chip or have i got to go down the esl route

 

Can't beat a plug and play! Simtek available at a grand supplied fitted and mapped and comes with loads of advantages. The PP is designed for a standard set up only.

 

Alan,

Just testing the waters here but what would I be looking at for a 2.1 CDB supply and fit to a 2002 WRX with either my existing heads ported and fast road cam fitted, or a set of AVCS Sti heads and cams fitted with appropiate ECU changes (Simtek I guess). I already have a 3' Milltek system, decat uppipe, APS SR40 turbo, STI TMIC, pink injectors and Ecutek map. I will have replaced the box with a 6speed before the car gets to you!

 

Hi.. We can sort out a drive in drive 2.1 stroker build.
That includes a CDB, fully stripped, rear thrust machined and chemically cleaned. Bored with honed to fit Wiseco pistons and K1 H beam rods, with a new 79mm nitrided crank. We use Cosworth engine bearings head gaskets and sump baffle plate, RCM oil pump and ARP head stud kit. We use stress plates for boring and honing. We fully overhaul the heads including guides and we fully balance the assemblies. The engine is painted silver. We clean the engine bay when the engine is out.
All work is carried out in our own workshop and machine shop. I personally run the car for the first 50 miles. We change the oil/filter again at this point.
Total £4867 inc vat.
We can flow the heads, but I wouldn't be making a deal of that at this projected power level, and I also wouldn't be recommending a cam change.
The stroker conversion will compliment your SR40 turbo, improving the spool and torque, and I wouldn't want to lose any of that by shifting the overlap. In any event, your top mount will be the top limit, and you'll find the turbo will fit the 400 bhp range just fine. 650 injectors I'd say.
We can supply and map a Simtek for £1233.75 inc vat

Hope all that helps!

 

lovely advert in jap performance regarding S206 and 2.1 stroker!
martin

 

Cheers for the info Alan, I'm not planning on keeping the TMIC or Turbo indefinately long term would be a bigger turbo and FMIC to aim for a solid 450 to 500. Would the proce be the same if I supplied a set of sti avcs heads with the car (in the boot)?

What age heads should I be looking at I know the Blob ones should be ok 2003/4/5 any others ok?

 

surprised you dont rate changing the cams mate i thought spec c cams were the way to go?

 

I'm thinking of saving your money! We've been able to make those figures without spending bucks on heads or cams. Our 2.1/S206 V5 is making 500 bhp on V power with standard cams. Of course there are plenty of other options to talk about if you're feeling flush!

 

Can't argue with that, but see above!

 

I was thinking of going AVCS to try and improve the spool, I only have std wrx heads and cams. I was thinking I could pick up a set of STI heads for around £700 then it's only the cost of the aftermarket ECU (Solaris/Simtek) to consider as I was thinking the cost of fitting a second hand set of heads would be tha same as refitting mine therefore in the long run saving money? In fact it would give me a long engine to get rid of/sell on?

 

I think there's more to it than that! EG engine loom, which I'm sure is different, having had to buy one for an AVCS car previously. The cams and pulleys are different, also the cam covers. You'd need the solenoids and oil feeds. The second hand heads would need to be stripped and checked, then overhauled.
The WRX uses tumble valves, which doesn't go with the AVCS loom. Etc...