Weak Point - OHC Turbo

Hello!

I want to ask what are the weak links of the OHC engine if I Turbocharge them.

I use the 205 Block from Sierra I think with 8,5:1 compression.

If I change the rods to H-rods and use APR Bolts, will the engine last longer
or do I need new pistons aswell?

I try to built a high reving turbo engine and want to use a 300 Degree Cam - Burton BF30
Burton road/rally camshaft .460" lift/300deg duration: SOHC Pinto
Duration 300deg. Timing figures 78/48/48/78. Inlet timing 108deg ATDC. Clearances .008"/.010"

The Turbo I use is a GT2560R Garret.


What is most important?
Oil Cooling ? Turbo Pressure ? Air Cooling ?

I will use a FMIC from Audi 1.8T, pressure not more then 1Bar and
a big Oil Cooler with thermostate.

Is that enough or need I a special Head Gasket, too ?

regards, Erik

The pistons are the weakest point, try to find cosworth pistons and rods and you will have a very strong bottom end.
The headgasket is also weak, but a cosworth grupp A works fine with some 12:9 bolts


You cant build a good working turbo engine with that camshaft and that small turbo, you will have to much exhaust backpressuare.

okay thanks.
will this be okay?

http://www.ebay.co.uk/itm/FORD-COSWORTH-YB-TURBO-WOSSNER-FORGED-PISTONS-CON-RODS-/300906462632?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item460f6c3da8

or is this okay too?
Bmw M3 Pistons with 93,5mm

http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=140977097069&ssPageName=ADME:X:RTQ:DE:1123


and, is this gasket okay?
http://www.ebay.de/itm/COSWORTH-GROUP-A-HEAD-GASKET-AND-BOLTS-GENUINE-VICTOR-REINZ-/261216833055?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3cd1bc8e1f

can I also use Cosworth YB Headbolts?

http://www.ebay.de/itm/COSWORTH-GROUP-A-HEAD-GASKET-AND-BOLTS-GENUINE-VICTOR-REINZ-/261216833055?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3cd1bc8e1f