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[rudebwoy]

ITS A NO GO!
race track opened in Germany may first this year, so got car ready, and roll out to the to see what I will run 8 psi , note I have 11.5 psi spring in my wastegate, and boost controller set to 14psi, something is wrong, I double check my s300 boost setting. all seemed fine, second run the following day with slicks, yes I am gonna do some damage, cause you can't beat me a 20 psi ;D. boost set for 20 psi came out the hole like a bore out of hell . 16psi on the 2step. 3rd gear I had no power one the race, but only at 4 psi after checking data log. I raced 3 more times before I quit.

drove my car home on the autobahn about 150 mph the whole way on 4 psi.

a week a of trouble shooting and and checking piping swapping wastegate springs, changing couplers and piping.
bypassing boost cantroller and all.
note car still drives good so I had no signs of a blocked cat.
last check after doing some thinking. normally I can hear the turbo through the exhaust at idle or low speeds. did not hear it. so I decided to check the cat , when I pulled it half the internals were already gone, the rest was just blocking the exhaust flow, punch the rest out :somb: and reinstalled, problem fixed instantly.
this happened to my friend last year except it did not block his exhaust it got blown out on its own.

magnalow high flow

[onlyflash944]

ok

[Corey]

well better keep an eye on things, we took the cats out of my buddys 450ish hp car and it leaned out a full point and then ruined a piston the next day at the track.

[onlyflash944]

congrats on the retune after making a major modification

[highroller54]

cats and rich tunes to keep detonation at bay do not play well together, the cat gets way to hot trying to burn off the excess fuel and melts down.

[Corey]

wasnt my car, he knew it was a problem but the tuner said it should be ok. built motors should be able to handle 12.5 afrs.

[onlyflash944]

how many psi?

[Corey]

whats it matter. it was mid 400 hp car. 16ish i think

[crxvtec91]

how many psi?

Psi is meaning less unless the turbo is known, psi brakes nothing cfm's do.

[onlyflash944]

how many psi?

Psi is meaning less unless the turbo is known, psi brakes nothing cfm's do.

whats it matter. it was mid 400 hp car. 16ish i think

he told me the conclusion i was going to make

[rudebwoy]

I definatley had to retune the car . I had add a lot more fuel to the entire map, went from 14.7 afr idle to 18 afr. and cruising around 16.4 afr, boost was at 12.7 afr after I removed the cat insides.

[magik123]

same happend to me on the dyno.. made 130hp WTF pulled the cat made 180    everything was caught in the bend over the rear suspension.

[HiProfile]

built motors should be able to handle 12.5 afrs.

orly? How about bearings, did you modify the block for some speacial bearings too? Detonation may not kill a piston, but it will break stock sleeves, ruin valves, and destroy bearings.

When I pulled my EF's cat out, half the shit inside was melted. Cats are definately not intended for power or too much fuel. I laugh at the high-flow waste-of-money crap.

[Towdogg]

So wait hold on!  You run a cat?  Thats the first thing I take out when I start to try and make a car fast...   Plus people buy them....

[ratcityrex]

So wait hold on!  You run a cat? 

I cant belive that he was even running one.
I dont know anyone that has a honda that makes over 200 hp and still has a cat. Why would you not take it out? SHould make for alot faster spool, and alot more top end power.

[rudebwoy]

I had it in because I recently had instection, plus it makes my car more quiet, I have 3" exhaust with know muffler, I think what really got it melted was the 2step at 6500rpm 16psi lauches, I tested it 2 times before I lined up and once on the line. plus I drove for 4 months on it. the cats are not that bad unless you abuse the shit out the car, normal driving is ok.

[ratcityrex]

cats are not that bad unless you abuse the shit out the car

SHit, I drive my car like I stole it!!!!!  :yes: