Holley Systemax II people, please enter!

[jimdrechsler]

Just curious as to what kind of numbers you put up at the track. I have 30# injectors with the bottom end stock. I heard that they are hurting me a bit and could do better times with 19's or 24's.

Please give me your times and mods done to your car including type of tires (Dr's, slicks ).

Thanks,

Jim

 

[jimdrechsler]

 

[gcwh02]

It seems to me that with stock heads and cam you are doing pretty good man. I would say the intake is too big and the injectors too, but the numbers are there

 

[jimdrechsler]

i actually have the holley alluminum heads and intake that came with the kit before i bought the car. just curious as to what others are getting tim ewise with same set up. probably not many on here with the kit i guess. still trying to figure out my misfire when it gets hot.

 

[Grn92LX]

Intake and injector size is fine, no problems.

You need more gear to run harder on motor.

Hows your tune?

 

[5spd GT]

Grn is right, the injector is fine...it isn't hurting you that bad like 'they' say...

I have seen a person swapping from 30's to 24's and the sampling tube and gained at the track...and he said it ran smoother. I have no doubt mine may run smoother with 24's as well.

People run faster mph's with less gear than that...so gears isn't your problem.

You can gain with a steeper gear and that particular combo...

Are you using the 'kit's cam?

You may want to make a seperate thread (if you haven't already) about the misfire when hot. Maybe it is your TFI on your distributor? Good Luck...

 

[jimdrechsler]

Grn is right, the injector is fine...it isn't hurting you that bad like 'they' say...

I have seen a person swapping from 30's to 24's and the sampling tube and gained at the track...and he said it ran smoother. I have no doubt mine may run smoother with 24's as well.

People run faster mph's with less gear than that...so gears isn't your problem.

You can gain with a steeper gear and that particular combo...

Are you using the 'kit's cam?

You may want to make a seperate thread (if you haven't already) about the misfire when hot. Maybe it is your TFI on your distributor? Good Luck...

i guess i will keep the 30's then. if i changed i would have to change the mass air meter too, correct? it is the cam that came with the kit. i heard that this cam is a little much for the kit. its power band is definately in the upper rpm's as opposed to the lower for sure. i will definately start a new thread about the misfiring when hot. it is annoying as he%^!!

thanks for replies

p.s. i actaully had a chip burned for it 2 years ago, so the tune should be fine although it still pops when cold after the tune!

 

[rj95svt]

The problems people have when going to 30lb injectors is usually due to a stock tune with a maf that fools the computer into thinking that it still has stock injectors. If you have a tune the low rpm rich condition alot of people have with those injectors should not be present if your tune was done correctly. I think that the only thing holding your car back is the fact that you have a upper rpm combo with only a 3.55 gear. 3.73's 3.90's or 4.10's would help make up for the lack of low rpm torque by getting your revs up faster. Of course with out tires you probably not gain anything.

 

[jimdrechsler]

i always thought it wouldnt make that much a difference. if i ever need new gears or a rebuild, i will change them with 3.73's i guess!

thanks

 

[5spd GT]

3.55's to 3.73's is a very minute difference...not worth it in my opinion. A steeper gear MAY help, but then you get higher revs, shorter 'traffic' gears, more engine braking. Those are a couple things I can't stand in a daily driver, but if I had a 'street car' or 'track car', I could take it for that extra slight edge

Yep, you would have to change out MAF's that are calibrated for your injectors. C&L MAF's have sampling tubes you can swap out, but may not be as accurate or 'tuneable' as a built in tuned MAF, like Pro-M...

 

[Rick 91GT]

The kit cam is junk, I never had very good results with it on my old 302.. best was a 12.6 @ 108. I swapped cams (AFM N-61) and went to a 75mm TB, 30# inj, 80MM Pro-M and was able to get the car in the 11.7 @ 117mph range.

Here is what the complete combo was...


SHORT BLOCK
-89 Block 8.8:1 comp
-89 Stock crank, rods and piston (notched for clearance)
-AFM N-61 Cam
-FMS Steel Timing Chain
-Canton 7qt T-Style oil pan and pick-up
-Melling Standard Volume Oil Pump
-ARP Pump Shaft

TOP HALF
HOLLEY SYSTEMAX II KIT
-Holley Avenger Series Heads PT#300-575 2.02" x 1.60" valves port matched to 1262 gasket
-Holley SysteMAX II upper ported to 80mm
-Holley SysteMAX II lower port mathed to a 1262 gasket
-1" Phenolic Spacer
-75mm Accufab TB
-80mm EGR DELETE Plate (custom)
-80mm Pro-M
-Fabbed Alum Valve covers with Stef's breather tank

COOLING SYSTEM
-Ron Davis Racing Radiator
-Stewart High Flow Water Pump
-180 Degree Thermo
-16" Perma Cool Electric Fan

FUEL SYSTEM
-Walbro 255lph HIGH PRESSURE pump
-30# Injectors
-Stock rails and lines
-Paxton AFR

EXHAUST
-1-5/8" Ceramic coated Mac long tubes
-2-1/2" MAC Flowpath Off Road H-Pipe
-2-1/2" MAC Flowpath Cat Back DUMPED

SUSPENSION
-70/30 Lakewood Struts
-50/50 Lakewood Shocks
-Eibach Drag launch kit
-Steeda Chrome-Moly Sub frames
-Metco Aluminum lowers, anti squat plate not installed, Delrin bushings
-JD's Performance Double Adjustable Uppers
-RNH PERFORMANCE Stainless Steel torque box re-enforcement kit
-JDM Caster/Camber Plates
-S&W 8pt FULL CUSTOM with X brace.

DRIVE TRAIN
-3:73 FMS gears
-STOCK AXLES!
-FMS Aluminum Drive Shaft
- Energy Suspension Tranny Mount and Frame Bushings
-Lakewood SFI Bell housing
-SPEC Stage III Clutch
-UPR triple hook Quadrant and Cable
-ROMAC SFI Balancer
-Mid South Eliminator Alum. Wing

ELECTRONICS
-MSD 6A
-MSD Blaster 3 Coil
-MSD Billet Dist.
-LIVE WIRES
-SPEEDBRAIN ECU
-Power Master 140amp Chrome Alternator

 

[rj95svt]

Like said above I'm not sure that the gain from 3.55's to 3.73 wouldn't be enough to deal with unless you had to tear the rearend apart for some other reason.

Very nice car Rick!!!