ibkevin

Chris, "mildly knife-edged", brilliant!

300guy

so... the honda cam gears use the same type of t-belt as the 944 (as in tooth size)?

I knew that the toyota 4AGE/4AGZE motors used a belt with the same tooth size... and I thought that I read somewhere that the hondas did too.

so that is cam gears for a honda B series motor (B16/B18/B20)?

What kind of HP do you figure 951 rods can take? What are your thoughts on shot peening?

Thanks for the info... prop's to Devon for starting this - more of this knowledge needs to be shared!

devgriff

After doing extensive research on estimated and actual costs associated with building a 3.0L 16v engine with shorter rods to reduce the CR, I prepared the cost guide attached.

This can be helpful in creating a budget for your project.

Chris White

There are only a couple types of belt profiles out there.

If you are using different cam and drive pulleys you get to spec the belt type since the teeth do not drive anything else.

I believe so, I would have to double check to make sure!

I have not seen a 951 rod fail (other than bearing failures that took the rod with it). I know of a fair amount of 500hp (crank) motors running stock rods with no problems. I don’t know the top end of the strength but they are pretty stout parts. The main draw of the aftermarket parts is the better windage properties and lighter weights.

The loading of the rotating / reciprocating parts is very different in a turbo engine than an NA – the stress is spread out over a longer time period so there is significantly less ‘peak’ loading. (check out Corky Bell’s books)

I don’t worry too much about shot peening – but it won’t hurt either!

If you want to worry about the bottom end and how it will last in high HP applications worry about the oiling system, oil cooling and intercooling (along with proper tuning of course!)

Chris White

facboy

I've got a very similar setup (in an almost stock 89 mind you)...I have the KEP Stage II, with a cup clutch disc and stock lightened flywheel.

it's easily streetable...i daily drive it with no issues. hill starts are a bit more difficult than with the stock clutch (if only because of the lightening), but other than that it's fine.

Tomas L

What are the piston choices that can be used in the alusil bore?

Konstantin

only Mahle and KS till now.
The rest must first prove that it works.

Konstantin

Tom M'Guinn

Sorry, what is KS?

Chris White

“Krappy Stuff”….
Not really – they make fine products
KobelSchmidt (I may have murdered that spelling) – OEM of many alusil related parts.

Chris White

ehall

Chris,

Is it possible to use the 2.5l block, with MID sleeves and 3.0 crank, to create a 3.0 16 valve?

Konstantin

Kolben Schmidt
means: piston smith or piston forger

http://www.kolbenschmidt.de/

http://www.kolbenschmidt.de/index.php?lang=2&fid=114

Standort Fort Wayne
USA

Wesentliche Produkte:
Kolben für
- Pkw Motoren
- Leichte Nkw Motoren
- Mittelschwere Nkw Motoren
- Marine-, Industrie- und Freizeitanwendungen

Kontaktadresse:
Karl Schmidt Unisia - ZOLLNER Division, Inc.,
2425 Coliseum Blvd. S.
Fort Wayne, Indiana 46803
U.S.A.

Telefon: 001 260-426-8081
Telefax: 001 260-423-2141
E-Mail: info-pistons@kolbenschmidt-pierburg.com

Konstantin

Chris White

Max 2.5 sleeve is 104mm and you can fit a 3.0 crank in with either custom rods or clearanceing the crank girdle. You will have to modify the 16v head to fit the cooling passage in the right front of the block (or get a 944S 2.5 block and head).

So, yes it is possible but not the cheapest thing to do. Since you need a 16v head and crank it is usually cheaper to buy the entire 3.0 engine.

Chris White

Tomas L

What are the valve sizes in a 944S2 and a 968 head?
Does anyone know what valve lift the stock camshafts in these engines have?

Tom M'Guinn

What is the max sleeve for a 104mm block with your MID set up?

ehall

I believe it is 106mm. Unless what he told me in the past has changed, or there are new options.