Two exhaust cam question(16V)

Mine made 170lbft @ 6K on schrick 276's and TB's at my local rollers. I've never been to Stealth though - but cupranet are going in Jan I believe so we'll see then.

Rob

 

Be interested to see your graphs from there Rob, keep us posted

 

Rob, what are you running to get those levels of torque?
Edited by: Alan

 

I think that the 42mm inlet would be better for my car as it is 95% a road car and its really the low end torque that it needs more of.
How can I tell what manifold the car has on it now? Its a 1990 spec

 

if it necks in where the spark plugs are it's a 50mm if it's all kinda straight then 42

 

Just checked and looks like its a 50mm

 

I got 171bhp/151 lb/ft on Sunday at Stealth with me little 42!

 

Good result 151 lbft

Ill be happy if I can get mine a little bit closer to that

 

I'll be aiming to beat that very soon Gary. You better watch out!!!

 

Yeah, but a 2.1 is cheating Martin

 

I guess that if a 2.1 is cheating then a turbo would also come under that heading

 

Nahhhhhh, Its under 2050cc, so being 2042 its a 2 litre. Nice try Gary

 

Sounds like a 2.0lt to me

What block are you running?

 

Running an ABF block with a 95.5mm stroke diesel crank. Lightened and balanced flywheel/crank. Sachs clutch, standard pistons machined to 0 deck height. Ported flowed head and, as for cams.....that'll be a secret

 

Have you had it on the rollers yet?

 

HAHAHA lol, I haven't even finished building it yet . I have the crank in, and plasti-gauged the journals to make sure its all within tolerance. Next is the pistons. My mate has my ring compressor so that will be picked up tomorrow. Everything else is basically ready. New oil pump, crank seals, block breather(didn't come with the block ) oil filter housing(neither did this and they are expensive!) sump and gasket.
A quick box rebuild while its out( have a pair of synchros ready to go in and a set of diff bolts) and a little bit more fiddling with the head and I'm ready to go. I'm hoping one of the lads in work will make me a baffled sump for a favour he owes me too.
It was on the rollers..sort of. It was in position but the wheels weren't full sitting on the roller as it was too low.
Then I'll probably sell it!

 

Sounds like its going to be nice engine once its together.
Sell it?

 

I know, don't ask. In my old age I think a MK3 maybe on its way.
http://www.picturetrail.com/gallery/view?p=999&gid=2606138&u id=1369296&members=1
watch out, this maybe a bit big for 56k!

 

MK3
Had a look at the pics, very nice
Mines looking a bit rough at the min, just had to put my winter wheels on to replace my split rims [:^(] I'm way to lazy to keep them clean in the winter

 

I got 136lbs of torque on my old valver on 42mm. The car also had a flowed AMD head.

It was measured on their rollers.
AMD always said the 42 mm gave slightly better low/mid range torque characteristics.

Depends what you want.
The 2 litre with a 50mm inlet fills in the torque graphs nicely.
I got recommended thje 268/276 combo from Bill. Apparently in the States they done many tests with different duration/makes of cams and they reckoned for ALL round ability the Schrick split combo gave good results.
Personally my car pulls cleanly from low down and is still very toqy in the mid rangw whilst still retaining a screaming top end. I get a serious surge between 5800-6200.

I will try and get to Stealth in Jan.

The power is nice if you have a good torque spread.
I hate the cars that are flat to 5000rpm then all of sudden power to infinity and beyond.

GVK I think has good torque but if the torque continues high up the range you will benefit all round.

The choice is yours.