mark kibort

It ran fine, once he put on the new intake gaskets. we had the exact same issues with Scot's car. to get it runing with the leaks, just stick a screwdriver to pry open the AFM and it will run, but at a higher than normal idle. (due to air leaks, and the screwdriver makes the ratio correct for the higher rpms)

put the intake on with new gaskets, and it runs like it does when it was new.

MK

hacker-pschorr

With no other modifications? I though you were playing around with fuel regulators and dampeners.

Harpo

So has anyone documented an actual performance increase with just the euro intake, plennum, and throttle body on an otherwise stock engine?
Mark

SharkSkin

Anyone have any thoughts on where I can lay my hands on a euro TB for my CIS system?

S

mark kibort

my 42hp gain was all that , plus cams. cams arent worth more than half that gain. thats on a dyno tested car that had multiple 200hp rear wheel runs before the mods. still all US 4.7 underneath, and US 4.7 heads with Ljet too.

mk

Jon F

Here's a chart. Draw your own conclusions.

SharkSkin

Was that 2nd JonF line with the euro throttle body and CIS unit ported to match, or just the plenum and runners adapted to the US throttle body? Doing that, plus cams and headers adds up to a lot more work and $$$... I think I'll just work on learning to carve better lines so I don't need the extra power.

S

Jon F

I used a 75mm US 32V throttle body ('85-'86) mated a port-matched U-section. The '80-'84 US cars use L-Jetronic EFI instead of the '78-'79 K-Jetronic CIS system.

SharkSkin

Hmmmm.... I still haven't heard anyone quantify their gains of hogging out the CIS unit & adding the Euro TB, Plenum, runners, & Fuel line. I told a seller of the euro plenum & runners that I was interested, he's looking for the EGR port (or at least a boss for it) and I think I'll be able to come up with a TB eventually. If I'm to be the guinea pig though, I'd like to find an extra CIS housing that I can hack away on.

Anyone have any euro cams for a 78 16V laying around? I have to get in there anyway to replace the cam tower gaskets. Any thoughts on whether the car will pass Ca smog with the euro cams?

S

John Speake

I used a 75mm US 32V throttle body ('85-'86) mated a port-matched U-section..............quote

Hi JonF,
I thought you were going to use the larger Euro S2 throttle body ? Aren't they larger than the 85-86 US 32v ?

Jon F

I wasn't able to locate a Euro throttle body (S2 or otherwise), so I used the 75mm unit (10mm larger than my stock throttle body) from the '85-'86 US 32V (290hp, 5 liter) car.

John Speake

Hi JonF
I just went and measured a spare Euro S2 throttle body I have, and it's 82.5mm diameter. The MAF is about 85mm.

mark kibort

cool chart jon,

However, I wonder if the lack of exhaust mods or the fact that the 75mm throttle body is somewhere in between the euro 2 valve throttle body size and the stock US throttle body diameter. ie, 2.7" necking down to 2.5" for the US, the euro is 3.3" necking down to 3", and the US 85 4 valve throttle body is 75mm (2.95") but what does it neck down to?
that could be an additional issue regarding performance.
I also think that Scot will get over 220 when we get his fuel out of the lean range.

the 78 cams are pretty close to the euro 82-85 cams but the main difference is in the lift. the 84 us cams are pretty much the worst of the bunch, right there with the US 82ish cams.

also note that looking at just hp is not a good way to look at the gains. we dont know what the previousl hP was for scot or the other 230hp 4.7 car. However, we do know that I did get 42hp , and at a min over the next few dyno runs, 235. However, on a good day, the previous dynos on the car without the euro stuf was 188at the wheels and 200 with an almost open exhaust. both WITH headers.

MK


MK

QUOTE]Originally posted by Jon F
Here's a chart. Draw your own conclusions.

[/QUOTE]

Jon F

I think the exhaust is definately a factor. A decent exhaust with '85-'86 manifolds or headers is probably worth 10-15 rwhp.

The '85-'86 US 32V throttle body is 75mm at the throttle plate, but 80mm or so at the opening.

The '80-'82 cams have slightly longer duration than the '83-'84, but considerably shorter lift. The '80-'82 cams are atrocious.

Mark Anderson

SharkSkin, "Anyone have any euro cams for a 78 16V laying around?"

We did just get in a 1984 Euro 310 hp with a bad cylinder so we have the complete top end available including the heads, cams and intake system.