Jump to content

New Intake Design


Recommended Posts

  • Replies 53
  • Created
  • Last Reply

Top Posters In This Topic

  • 2 weeks later...
Picked her up last week, there was a little trouble with the tunning. I got the Haltech and injectors though Swiftracing Technologies. The injectors are 1000cc and the tune is very rich. Has anyone else used injectors that big or are these overkill.
Link to comment
Share on other sites

Doesn't the fip intake use the 1000 cc injectors also? Maybe one of those fip user

will chime in for some feed back.

 

The FIP Hurricane MPI system came with 4, 75 lb injectors. I think those are equivalent to about 750 cc. I'll be taking her down to SRT for a good tune as soon as I have a free weekend.

 

BTW, the intake is amazing, I'm only running about 8 PSI until she gets fine tuned, the response is smooth, quick and she just flies!!!

Link to comment
Share on other sites

  • 2 weeks later...
1000cc's is huge unless you are running e85. Even with 650's I was down to 1-2% duty cycle at idle and the thing ran fat. Most Hurricane setups have 750cc injectors so you might want to downsize a bit. I could hit 22psi at 5k and was only at 80% duty cycle on my 650's.
Link to comment
Share on other sites

I could hit 22psi at 5k and was only at 80% duty cycle on my 650's.

 

I too was able to support 20+ PSI on a 60-1 T4 turbo with 650's without running out of fuel. Too much injector is like runnig ntoo much carb, just wastes gas at idle and throws away tunability.

Link to comment
Share on other sites

Could consider to use flex fuel injectors, designed to be large size that can run at low duty cycle. But I have heard they are more sensitive for what fuel pressure your running. But really not needed unless your actually going to run E85.

 

My 60-1 at 15psi was maxing my 550cc's out... close to 100% duty and still needed to raise the fuel pressure. Now I have 720cc, but havent got it going yet.

Link to comment
Share on other sites

you might try using a fuel injector calculator.

http://www.witchhunter.com/injectorcalc1.php4

I personally wouldn't bother running less than 95lb/950cc's anymore.

I like the ball and seat injectors because of the better spray pattern, they seam to idle better, I think 950 is the smallest you can get them in.

PWM will idle better than Peak and Hold, but you need an EMS that supports PWM.

With low impedence injectors, without a resistor box, you can control down to about .1% injector. That's part of the difference in Pulse Width Modulation versus Peak and Hold.

Granted PWM has to be "tuned" to control that precise, but you should have all the data on hand from your injector manufacturer.

 

Back on subject though, this intake looks nice. I'd like to see a dyno sheet.

Link to comment
Share on other sites

What's the power goal and on what gas? 750s made 363whp with tons of room left to go on pump gas ( like 50some% duty cycle). 390whp on e85 in the low 90% duty cycle. If you are going to use pump gas, don't expect much more than 350-360whp. Thus, 650s would be fine, imo.
Link to comment
Share on other sites

  • 4 weeks later...

you might try using a fuel injector calculator.

http://www.witchhunt...ectorcalc1.php4

I personally wouldn't bother running less than 95lb/950cc's anymore.

I like the ball and seat injectors because of the better spray pattern, they seam to idle better, I think 950 is the smallest you can get them in.

PWM will idle better than Peak and Hold, but you need an EMS that supports PWM.

With low impedence injectors, without a resistor box, you can control down to about .1% injector. That's part of the difference in Pulse Width Modulation versus Peak and Hold.

Granted PWM has to be "tuned" to control that precise, but you should have all the data on hand from your injector manufacturer.

 

Back on subject though, this intake looks nice. I'd like to see a dyno sheet.

Great tool, based on the calculator with a 350-400 hp output goal, I only need 750-800 cc injectors at 80% work cycle. maxboost and I always thought 1000 cc injectors were a bit much. SRT use these routinely with the Haltech and have no tuning issues? I will see as soon as I have a chance to take it down for a good tune.

Link to comment
Share on other sites

What's the power goal and on what gas? 750s made 363whp with tons of room left to go on pump gas ( like 50some% duty cycle). 390whp on e85 in the low 90% duty cycle. If you are going to use pump gas, don't expect much more than 350-360whp. Thus, 650s would be fine, imo.

I was shooting for 350 whp on pump gas, once I get a good tune and dyno, I can judge better what the real hp potential will be. But I agree, I should be fine with 750s for my performance goals.

Link to comment
Share on other sites

  • 3 weeks later...
  • 2 weeks later...

I have my old Delphi 750's if your interested. Theyll support 450whp + w/ 45psi base.

Right now the car is up on jack stands for the Winter. Won't know about the injectors 'til I get a fine tune down at SRT in the Spring. Thanks for the offer, if you have 4 of them, I might take you up on the offer as soon as I know.

Link to comment
Share on other sites

Any real news on this setup and if MaxBoost will sell these at all again? I am very interested and would by the setup as soon as i could afford it ;-)

The real news is the set up is fine. Only issues are with the ECU not the MPI. maxboost87 is not a Haltech specialist and had problems with the tune. Injectors are probably too big which made matters worse. Right now he's working with some muscle car shop, Mopar stuff. Don't know if he'll be doing anymore Starquest fabrication, hard to get in touch with him and he's not active on this site. Good luck, I think this is a one of a kind.

Link to comment
Share on other sites

  • 1 month later...
I thought about that idea years ago and was going to do it for personal use but my TBI plenty strong enough to have my way with alot of cars out there and my wife is strictly against speed.
Link to comment
Share on other sites

 Share


×
×
  • Create New...