I just bought my cousin's '91 Sy. He had too many projects and was burned out on this one. I've been checking out the Forum for the last week and have found lots of useful information.
Here is a rundown on the truck, which I just trailered from Davie,FL to Ft. Worth, TX:
#612 - 32,000 miles
Rebuilt Short Block - polished crank, shot-peened rods, .30 over JE pistons - BALANCED
L34 heads, Comp Cam roller, 1.6 roller rockers.
ATR aux. heat exchanger, larger turbo (?), Johnson circulation pump.
Applied Technologies SY333A SS Headers & Exhaust (cat delete)
GReddy Boost Control, F.A.S.T. ecu & wide-band O2 Sensor
AutoMeter pillar gauge set - Boost, Fuel Pressure and Pyrometer
Total re-paint ('91 clearcoat was trashed) - smooth, color-sanded - nice job.
ZR-1 wheels w/Sumitomos
Clarion stereo w/Sirrius
My learning curve is straight up at this point, so please bear with me.
After a poor attempt to tune the truck (Florida tuner blew a head gasket, when engine was run too lean), following the short block/turbo/exhaust/etc. upgrades, the F.A.S.T. was added .
When I got the truck, my cousin told me that it needed to be set up and that it is currently "very rich", so as to avoid a repeat of the head gasket incident.
There was a chart in my paperwork - receipts, instructions, documentation, etc.
It indicated a AFR of 10.50:1.00 and as rich as it smelled, I'll bet that is where it is.
This afternoon I dropped the Sy off to A&S Automotive (Keller, TX). They performed a dyno-tune on my moderately modded '94 Z28 and got 300hp at the wheels - normally these do 235-240hp (shorty headers, free flow exhaust, K&N filter and underdrive crank pulley).
He says that he should have no problem tuning the Syclone.
I've asked them to limit the absolute boost to 20 lbs and informed them that I was told the valve train was good to 6500 rpm , but don't expect it will need to rev that high.
It appears that the IC pump is set up stock (only runs under boost) - I plan to bypass this feature and run the pump whenever the engine is running.
My goal is to keep this thing well below the "grenade" level and benefit from the heavier-duty parts and inceased flow offered by the Turbo, heads and exhaust.
I welcome any and all advice. I will undoubtably be asking more specific questions as I get further into my new toy.
Thanks,
Chris
Here is a rundown on the truck, which I just trailered from Davie,FL to Ft. Worth, TX:
#612 - 32,000 miles
Rebuilt Short Block - polished crank, shot-peened rods, .30 over JE pistons - BALANCED
L34 heads, Comp Cam roller, 1.6 roller rockers.
ATR aux. heat exchanger, larger turbo (?), Johnson circulation pump.
Applied Technologies SY333A SS Headers & Exhaust (cat delete)
GReddy Boost Control, F.A.S.T. ecu & wide-band O2 Sensor
AutoMeter pillar gauge set - Boost, Fuel Pressure and Pyrometer
Total re-paint ('91 clearcoat was trashed) - smooth, color-sanded - nice job.
ZR-1 wheels w/Sumitomos
Clarion stereo w/Sirrius
My learning curve is straight up at this point, so please bear with me.
After a poor attempt to tune the truck (Florida tuner blew a head gasket, when engine was run too lean), following the short block/turbo/exhaust/etc. upgrades, the F.A.S.T. was added .
When I got the truck, my cousin told me that it needed to be set up and that it is currently "very rich", so as to avoid a repeat of the head gasket incident.
There was a chart in my paperwork - receipts, instructions, documentation, etc.
It indicated a AFR of 10.50:1.00 and as rich as it smelled, I'll bet that is where it is.
This afternoon I dropped the Sy off to A&S Automotive (Keller, TX). They performed a dyno-tune on my moderately modded '94 Z28 and got 300hp at the wheels - normally these do 235-240hp (shorty headers, free flow exhaust, K&N filter and underdrive crank pulley).
He says that he should have no problem tuning the Syclone.
I've asked them to limit the absolute boost to 20 lbs and informed them that I was told the valve train was good to 6500 rpm , but don't expect it will need to rev that high.
It appears that the IC pump is set up stock (only runs under boost) - I plan to bypass this feature and run the pump whenever the engine is running.
My goal is to keep this thing well below the "grenade" level and benefit from the heavier-duty parts and inceased flow offered by the Turbo, heads and exhaust.
I welcome any and all advice. I will undoubtably be asking more specific questions as I get further into my new toy.
Thanks,
Chris
