Performance Chip Question - ZR-1 Net Registry Forums

Patton · 11-23-2005

http://www.acsvette.com/chips.html

At Mr. Crowley's site, he mentiones the removal of secondaries as a feature in his performance chips. What the junk is that about? Anybody?

Aurora40 · 11-23-2005

I believe he'll add programming to deal with the removal of the secondaries if you've done that to your car.

bobbyhi · 11-23-2005

Not being too mechanical, I don't understand the reasoning of removing the secondaries. I thought that was so special to the Z's.

tomtom72 · 11-24-2005

I think it is a case of having both injectors serving the fuel needs all the time. I believe Cliff, LoTu5, from London has this set up on a 418 cu in motor. I don't understand all of the theory behind it. I guess you eliminate all those secondary parts so they can't fail on you?

A thought...I would guess when the motor gets on the cams the transition is less dramatic? I mean nothing is blocking the air flow thru the other ports and the injectors are already adjusting the A/F ratio so the big power is just there all the time?? I'm wondering if those cars must feel like an old rat motor from the 60's & 70's? I once drove my friend's 396/350 camaro & it was way different than my LT-1. The 396 felt like a stump puller from way down low in the rev band where the sb needs to get some revs up before anything happens.

Tom

FU · 11-24-2005

The stroker engine's may benefit from removing the secondaries. Tuning is a fine tooth blade also.
For a stock CUI or even a 368 car removing the secondaries would probably hurt the car .

I'm more impressed with the top end car's putting out 420 + RWHP .

Patton · 11-24-2005

My sentiments exactly... Thats my goal actually. Squeeze as much out of the top end/exhaust and other small things here and there without changing the displacement. Although im still alittle uneasy about porting for some reason, I just dont like the idea of taking metal off. Tweeks a nerve in me.

11-23-2005	#1
Patton Join Date: Dec 2003 Location: Sacramento, CA Posts: 224	Performance Chip Question http://www.acsvette.com/chips.html At Mr. Crowley's site, he mentiones the removal of secondaries as a feature in his performance chips. What the junk is that about? Anybody? __________________ "Mr. President, we must not allowwww... a mine shaft gap!!" -General Buck Turgidson 1994 ZR1 - White on Black

11-23-2005	#2
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,713	Re: Performance Chip Question I believe he'll add programming to deal with the removal of the secondaries if you've done that to your car. __________________ Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img]

11-23-2005	#3
bobbyhi Join Date: Jul 2005 Location: Mendota Heights, MN. 55120 Posts: 984	Re: Performance Chip Question Not being too mechanical, I don't understand the reasoning of removing the secondaries. I thought that was so special to the Z's. __________________ Bob Anderson 1990 #2405 White/Gray Haibeck chip,4:09 gears,Power Effects Exhaust,5 spoke chrome,C5 brakes,49th Street rockers,K&N,Hurst,Headers,Upper & lower ported Minnesota State Director Founding Member #19

11-24-2005	#4
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: Performance Chip Question I think it is a case of having both injectors serving the fuel needs all the time. I believe Cliff, LoTu5, from London has this set up on a 418 cu in motor. I don't understand all of the theory behind it. I guess you eliminate all those secondary parts so they can't fail on you? A thought...I would guess when the motor gets on the cams the transition is less dramatic? I mean nothing is blocking the air flow thru the other ports and the injectors are already adjusting the A/F ratio so the big power is just there all the time?? I'm wondering if those cars must feel like an old rat motor from the 60's & 70's? I once drove my friend's 396/350 camaro & it was way different than my LT-1. The 396 felt like a stump puller from way down low in the rev band where the sb needs to get some revs up before anything happens. Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

11-24-2005	#5
FU Join Date: Mar 2004 Location: Found Member Posts: 4,346	Re: Performance Chip Question The stroker engine's may benefit from removing the secondaries. Tuning is a fine tooth blade also. For a stock CUI or even a 368 car removing the secondaries would probably hurt the car . I'm more impressed with the top end car's putting out 420 + RWHP . __________________ Frank Urbo. NCM Lifetime member # 982 Registry Founding # 237

11-24-2005	#6
Patton Join Date: Dec 2003 Location: Sacramento, CA Posts: 224	Re: Performance Chip Question My sentiments exactly... Thats my goal actually. Squeeze as much out of the top end/exhaust and other small things here and there without changing the displacement. Although im still alittle uneasy about porting for some reason, I just dont like the idea of taking metal off. Tweeks a nerve in me. __________________ "Mr. President, we must not allowwww... a mine shaft gap!!" -General Buck Turgidson 1994 ZR1 - White on Black