jaber911

I have a problem engine
stock ls1 347ci block with
5.3l heads porting 59cc
cam 207 220 571 581 118 lsa
rocker arm 1.7
seytem EXHAUST 2.5"
HEADERS 3"
SLP Premium balancer
42lb Injectors
FAST INTAKE MANIFOLD& 92MM THROTTLE BODY 92MM
Lingenfelter COLD AIR INTAKE


give me 309wrhp


then
change the heads with afr 205 66cc
GT11
pushrod 7.400
slp oil pump

give me less than 300 wrhp

i have also problem from long time low oil Pressure Even with 2nd setup


Will check tomorrow engine Mechanically and electrically
and check Cylinder compression first
any Advice I would be happy

davered00ss

iTrader: (4)

You had something wrong before the Heads & cam swap. A4 or M6 tranny?

Could be compression problem?
Could be pushrod length?
Could be a slipping clutch?
Could be a bad tranny?

Who tunned the car & what do they think?

Ericbigmac83

iTrader: (19)

What has your tuner said?? Get your compression check. That sucks big time. I hope thats at least on a mustang dyno

99FormulaM6

iTrader: (21)

What type of dyno was used?

jaber911

the tunned said alot of problem one of them compression problem
i will check slipping clutch also
thanks davered00ss

jaber911

tunned in jet dyno by Professional

elias_799

iTrader: (8)

well first you had 59cc heads and you have switched to 66cc heads, this lowered your compression slightly which explains SOME of the power loss.

Oh4GTO

iTrader: (46)

There is something seriously wrong with that short block. Compression check will tell you a lot. You may be running on 7 or 6 cylinders.

jaber911

yes the first heads was 5.3L 706 with 5.7L BLOCK
2nd heads afr 205 66cc
difference Even low copression , but AFR heads must give me more power
At least above 400
thanks elias

jaber911

can any one give me Compression Pressure for cylinders ??

disc0monkey

iTrader: (10)

5.3l heads porting 59cc
cam 207 220 571 581 118 lsa

just by looking at it this setup is boarderline for 93 octane. you might have pounded the hell out of ur main bearings.

kmracer

iTrader: (1)

that thing probably does have quite a high DCR. something is obviously very, very wrong though.

SweetS10V8

iTrader: (4)

You need to tell us...

Shawn MacAnanny

iTrader: (12)

Yeah thats a small cam which means a high dynamic compression ratio. Are you sure the cam is installed correctly too? Not off by a tooth. You should have been making 309rwhp without the cam or the heads really.

As mentioned compression check the motor, pull the timing cover and check the cam maybe. When you had the heads off did you look at your lifters or anything? What length pushrods did you measure for with how much preload?

rons 00z

iTrader: (10)

how low is low oil pressure?

jaber911

After checking the engine electronically indicate that there was a malfunction
knock and map sensor not working so changed

nothing change
Still i will check Compression Pressure for cylinders Tomorrow one by one

pushrod changed form stock to 7.400 with 2nd setup
timing lifters Normal after setup

low oil pressure show Warning Come and go !!!


I think the problem from the block now after overhaul befor the 1st setup

thanks

disc0monkey

iTrader: (10)

do you know what the DCR is for your combo.

disc0monkey

iTrader: (10)

i thought stock was 7.400

jaber911

NO all i now is
11.3 run on the 98 octane

after 2nd setup 10.2 run on the 98 octane

Mean87SS

iTrader: (21)

some people shouldnt have the internet...