369 replies to this topic

[SA EH]

Cheers Dave

[N/A-PWR]

Get that head breathing Jonesy,

my one made a race motor on any block, that is the key,

and it only had 308 valves, plus 100 thou shaved, 44cc chambers and 250psi pots with a 30/70 cam at the time. Dave I

[MictheAussie]

Is the convertor the issue. It seems like there wasn't much until almost the 60ft mark and then it took off.

I don't know much, but just an observation. it sounded like it just needed to launch a thousand RPM higher.

[warrenm]

Apprecitate the info Mick, and yeah it is early days. I guess my expectations were too high.

I couldnt get it to wheelspin, even if i tried mate. best 60ft time at 2.159, crossing the line at 5k ish at 94.65mph.

 

 

Now the only downside is, i cant even let it warm up, do a 1/4 mile pass then return to the pits without the coolant spewing issue...

If you couldn't get it to turn the tyre's on the launch, add air to the tyre's. I'm sure that with some tuning, engine, technique & chassis you'll get some better times.

I haven't had any issues running up to 13:1 compression from an ACL race series gasket. 

[biga064]

Hi Jonesy whos converter is  in it ?  All converters are not equal  Should come off the line a lot harder !! How modified is your transmission ?  Have you been able to check what stall your actually getting ? Not saying this is the problem but all helps in the end . Like I said before with my EH still trying to crack 100 mph !! 14.2 at 99 mph with a similar combo to yours .

[SA EH]

It's a dominator 4500 converter, but I reckon it's working ok. It stalls correctly, just think it's the tune up at the mo. The powers not there to get it going.

[biga064]

Mines a dominator too !! 4200 stall .  

[biga064]

Hi Jonesy , out of interest what style extractors or headers are you running ???

[SA EH]

Off the shelf hpc coated pacemaker extractors.

[N/A-PWR]

the short motor is bullet proof for now Jonesy,

just start swapping 1 bit at a time after your tuning don't do much better. Dave I

 

by the way, can you remove another 200 kg's from the EH

[SA EH]

So after doing a compression check, all cylinders achieved between 180 - 190psi, with a couple getting there a little slower than the others (& now I know why).
Carried out a cylinder leak test... or pumped air into each cylinder & with the radiator cap removed, watched for any rise in level.
In short, 5 & 3 are loosing heaps of compression, 1 & 4 lose a tiny bit, and 2 & 6 nil. Great stuff! Guess it's my old friend Mr Head Gasket again, pretty sure i couldn't have cracks in the head on 4 cylinders

 

 

 

Funny crackers arent ya

Edited by SA EH, 29 April 2014 - 10:29 PM.

[N/A-PWR]

Hi Jonsey,

if this helps, I only used Standard Head Gaskets and no glues, and still got 250psi every time,\

because that Head goes on each Motor and has a 30/70 or a 41/73 Cam. Dave I

[SA EH]

Yeah Dave im thinking of throwing the gas & running one of my many standard gaskets i have here.

Seems to be the easiest way.

[N/A-PWR]

hard to work out the Compression Ratio Ryan,

is why we don't hear much about it, but if you go by compression test, you can gather how much compression there is,

so standard is from 149psi and up from there. Dave I

 

wow, never heard of numbers this high in a 202 on pump fuel before? Surely there is some detonation? Can someone with greater knowledge than me (so anyone) please explain? lol

Just read the whole thread, very nice mate. You've got a great car and engine combo!

also, I ran Super Petrol up until it was phased out

[N/A-PWR]

unleaded too I suppose,

that's where E85 or Methanol comes in 

or AV Gas even

More Octane, but I had no trouble with 100 Super, so there is a Key 

[SA EH]

Well mine does ping a little, generally at the top end, that's why I run an octane booster for insurance. But it was great on e85.

And I'd rather sacrifice streetability, fuel economy, and cooling issues with high comp than horsepower any day...

[warrenm]

Without reading back through everything, what cam are you running?

Maybe detonation has "pushed" the gasket.

[SA EH]

Yeah Warren it's a crow 35731, 253/260 @ 50.