CP is the best bet. A lot of engine tuners swear by them. Also if I'm not mistakes HorsePowerFreaks uses them. You should email them and see sales@cp-carrillo.com

I know people who run high boost usually reduce their piston diameter a little because from very high boost piston expands.

What kind of transmission are you running?

 

Thanks ill check them out.
The 6-speed manual from MB Hasn’t mists a beat yet, the clutch friction disc is not the same story, I had to go to a Shafer race disc.

 

Pretty impressive , I heard a lot of people say the MB manual can not hold much power. How much horsepower do you have my friend? The supercharger can handle 40psi? Learning something new everyday

 

Whoa. . . epic coupe thread here Can you provide more pics of this beast? Good to see someone pulling out more potential out of the 1.8L m271 motor What numbers are you putting down onto the road?

 

It’s got 280hp at the wheels, keep in mind the car has gone trough some significant wait los, it barely weighs 2000lb.

 

Damn Dynoed mine and i was only putting down 160hp to the wheels. . . now I gotta rip everything out

 

Ripping everything out wont give you more hp at the wheels, but it will give you better hp to wait ratio, 10k will give you more hp at the wheels, now keep in mind I am having some piston problems I’m probably running to much boost on the compressor, I’m waiting for the metal expert at the lab to tell me what happened to the pistons.
Il post some picks when it’s all back together.
.

 

 

This has got my attention

 

I change what i said

 

Ya that'll happen when someone finally explains themselves two days and a page after their very first post ever saying they've melted the pistons in his 1.8L race engine

 

i burn many pistons in my old cars... threw rod on the concrete.... etc etc etc
i found that : too much timing = holes in pistons, too much boost = holes in pistons...

read : http://www.pumaracing.co.uk/
and : http://www.sdsefi.com/tech.html

all your troubles are listed here

40 psi with a supercharger.... must run alcool

my 2 cents ...

my old car : http://www.cardomain.com/ride/629018/1997-ford-aspire

Yvan

 

Check this out (off topic) but I think you must see it.
http://www.youtube.com/watch?v=rmNy-ajRV0U

 

The numbers still dont make sense. Stock the car runs 5-6psi and dynos around 160-167.

If your only making 280 whp at 40 psi that supercharger is way out of its efficiency range, IMHO its more of a heat pump at that boost then an air pump. Its not surprising your shattering pistons (not melting). You must be making an epic amount of tq.

You know eaton does custom remans right? If you massage that super charger right and build the bottom end you should have no problem making MB look really good, could be another 100hp in it for you. Depending on the rules in your class. Or you could even get the same power at a lower psi and make the car way more reliable.

Does your piston always break in the same place, it might be glow ignition from one of the valves heating up to red hot. Its a strange type of damage considering the piston looks good other then the chunk missing from the edge. Its certainly some form of violent detonation, is it too lean? I'm interested to see the grain structure at the failure, can you post pics?

New pistons are such a brute force way to fix the problem, have you thought about cryo treating stock ones?

 

Coupecrazy03, this is what your car is going to look like if you rip everything out, I find it a lot more spacious, 1 more +, no back seat driver, there’s no back seat! Loll.

 

Thanks Yvan;
Very interesting read and yes I do need to educate mi self on boost and ECU’s so I can stop relying on others.

 

More pics!!!! Best CL203 ever!!!!

 

You’ve got mi devoted attention, en extra 100hp go for it.
Glow ignition, maybe but there are no bent valves
Yes the pistons always brake or melt at the same place (I should get the results from the metal lab this afternoon) on the intake side pieces missing, on the exhaust side some melting.
I’ll take some pics to night.

 

So 457cobra what was the cost of the port job? Is this were most of your power coming from? Also what company underdrive pulleys are you using. I wonder what mods would be best for an everyday driver. This much power to the wheels would be great but blowing pistons would be an headache. Can the standard 03 c230k trans handled this? Thanks

 

The head job is from VRP performance tuning, cost $4194.75, underdrive pulley from Kleeman, if you put all that gas in the engine it has to come out in a hurry so you are going to need some headers mine are also from Kleeman.
I don’t think you are going to have any problems with head, pulleys or headers, I’m almost certain mi piston problems are from to much boost.
The trany has never been a problem for me but I broke two diff before I started using a Hewland adjustable ramp style diff.
Now for normal street use you shouldn’t have any problems.

 

Oh I know about it not adding more power but it should move a bit quicker if all that unnecessary weight wasn't there weighing it down. That interior setup is epic I always heard negative reviews about racing out these cars but ill take your word for it if you say it is pretty track worthy Keep up the good work bro and post up some videos of it on the track some time.

 

Is the Kleemann underdrive pulley worth it? Im running the Kleemann headers myself with no complaints :

 

I think so, hall-do I have never done a back-to-back run on a dyno.

 

i build on my old car a 1.8 dohc and add a turbo.... 174 whp at 7 psi... i think supercharger are not the best for high boost operation, the blower put a tanderemous amount of heat... the pistons melt end crack from overheat. does your engine have oil jet under the pistons ???? if not it can help but to keep detonation level low, you need low compression and some good gaz, an efficient supercharger and enough fuel.

Yvan

 

http://www.sdsefi.com/meltdown.htm

explained here

Yvan