Top Speed?
05-13-2006, 05:54 PM
#152
Big Poppa
Join Date: Jan 2005
Location: Mission, British Columbia
Posts: 4,499
who does intake porting, and how, i think thats my weak spot, i got the airflow till there, but it bottlenecks after the port match, and i need a better header, its limiting as can be, ill order one from the site j posted. did you balance the bottom end. is it ness. for 7000rpm frequently. and where do you get injectors, and what ecu setup. i want more power.
05-13-2006, 08:21 PM
#153
Head Muckraker
Join Date: Oct 2001
Location: Bay Area
Posts: 9,221
Originally Posted by jfairladyz
His site says he's running 9.7:1 c/r. 
Is that a typo or is that just old info? I can't see 273HP naturally aspirated with a 9.7:1 c/r.
Is that a typo or is that just old info? I can't see 273HP naturally aspirated with a 9.7:1 c/r.
05-13-2006, 08:36 PM
#154
Head Muckraker
Join Date: Oct 2001
Location: Bay Area
Posts: 9,221
Originally Posted by SHADY280
who does intake porting, and how, i think thats my weak spot, i got the airflow till there, but it bottlenecks after the port match, and i need a better header, its limiting as can be, ill order one from the site j posted. did you balance the bottom end. is it ness. for 7000rpm frequently. and where do you get injectors, and what ecu setup. i want more power.
It was done with a custom made grinder. Think of a modern Dremel tool with the flexible tip and an aluminum grinder head. It was truly a work of art as that is what it was back then. Back then, these guys were artists with great mechanical aptitude.
Yes, I would always balance the bottom end. Even when I'm not planning to spend a lot of time at 7000+ rpm, it just makes everything "FEEL" smoother. I'm sure some of it is psychological and the additional cost may not warrant it depending on your machine shop, but it's definitely worth it to me.
I was using a second hand Electromotive engine management system that I bought off an SCCA Pro-racer. This was a pre-Tec1/2 Electromotive system. You can do the same thing with a $350 MSnS-E EMS now. It boggles the mind what is possible now with so much less money... ;(
05-13-2006, 08:56 PM
#155
Registered User
Join Date: Apr 2005
Location: Temecula, CA
Posts: 5,485
Originally Posted by lww
Nope, it's really 9.7:1 CR. Dave (Rebello) is one of the premiere L6 engine builders in the US. The other is Sunbelt Racing, but I'm not sure who's working there anymore.
Originally Posted by lww
I was using a second hand Electromotive engine management system that I bought off an SCCA Pro-racer. This was a pre-Tec1/2 Electromotive system.
05-15-2006, 06:59 AM
#157
Registered User
Join Date: Mar 2006
Location: florida
Posts: 271
Some of the best headwork I have seen on L engines was done by B. C. Gerolomy. At one time, he was the hot ticket on ITS engines.
AT datsun dynamics, we got a bunch of electromotive L-28s and were able to see exactly how devendorf did so well.
AT datsun dynamics, we got a bunch of electromotive L-28s and were able to see exactly how devendorf did so well.
05-15-2006, 08:15 AM
#158
Originally Posted by PooFlinginMonke
Some of the best headwork I have seen on L engines was done by B. C. Gerolomy. At one time, he was the hot ticket on ITS engines.
AT datsun dynamics, we got a bunch of electromotive L-28s and were able to see exactly how devendorf did so well.
AT datsun dynamics, we got a bunch of electromotive L-28s and were able to see exactly how devendorf did so well.
05-15-2006, 08:22 AM
#160
Registered User
Join Date: Apr 2006
Posts: 2
I have heard and seen what happens when you take a 6cyl z motor past 7500. I was told if you pass 7500 even on a balanced engine the motor has bad harmonics and becomes unbalanced then flys apart. this is do to the fact that the z motors are not fully counterweighted engines.
But on a lighter note I have had my 79zx with motor work, airdam, and zxr wing to 147 at MIS speedway
But on a lighter note I have had my 79zx with motor work, airdam, and zxr wing to 147 at MIS speedway
05-15-2006, 08:25 AM
#161
Originally Posted by dat28079
I have heard and seen what happens when you take a 6cyl z motor past 7500. I was told if you pass 7500 even on a balanced engine the motor has bad harmonics and becomes unbalanced then flys apart. this is do to the fact that the z motors are not fully counterweighted engines.
But on a lighter note I have had my 79zx with motor work, airdam, and zxr wing to 147 at MIS speedway
But on a lighter note I have had my 79zx with motor work, airdam, and zxr wing to 147 at MIS speedway
05-15-2006, 03:09 PM
#163
Originally Posted by PooFlinginMonke
Maybe if you have a 280zx turbo available you can run it on the lift and see for yourself.
Originally Posted by NismoPick
Well, it's not a speed limiter, nor a rev limiter. With countless peoples testimonies (including my own) of getting up to 130+ mph & rev'ing well past redline.... do tell me what the limiter is set at.
I've rev'd L28's & L28ET's well past redline before, and I've taken my 280ZXT (WHICH IS A 280ZX TURBO) up to 139mph (driving next to my buddy in his C5 Vette), so I know there is no rev / speed limiter. About your Z crapping out when you changed gear ratios... maybe your Z needs a tune-up.
Did you also miss this post by L-Dub?
Originally Posted by lww
There is no rev limiter on any of the factory 280ZX ECU's.
Whatever you were hitting wasn't the result of a signal from the ECU. It was either a fuel, air or spark related problem.
Whatever you were hitting wasn't the result of a signal from the ECU. It was either a fuel, air or spark related problem.
Last edited by NismoPick; 05-15-2006 at 03:11 PM.
05-15-2006, 03:56 PM
#164
Registered User
Join Date: Sep 2005
Location: z junk yard
Posts: 1,271
there is no rev limiter on any 280zx that i now of... but i did see a honda civic Si 2005 have a rev limiter it stoped at likr 5,000 rpms... " i would personally never take my 280zxturbo to red... unless nismopick said so lol jk.. even if my car was modied to the max..
05-15-2006, 04:06 PM
#165
Originally Posted by nismo619
i would personally never take my 280zxturbo to red... unless nismopick said so lol jk...
05-15-2006, 08:21 PM
#168
Head Muckraker
Join Date: Oct 2001
Location: Bay Area
Posts: 9,221
Any relation to John Coffey?
I assume that was on Dave's engine dyno? So that should be about 245 to 255 rear wheel hp. Is your 280 block bored and stroked? What's the current displacement?
B.C. Gerolomy used to be one of the best L series engine builders in professional racing. Major props there.
The only two serious builders left are Rebello and Sunbelt, but as I mentioned earlier, I don't know anyone that currently works at Sunbelt, so I can't attest to any of their current quality. Dave on the other hand is crankin' 'em out in Walnut Creek (10 miles from my house - I buy all my rebuild parts from him directly) as usual.
I assume that was on Dave's engine dyno? So that should be about 245 to 255 rear wheel hp. Is your 280 block bored and stroked? What's the current displacement?
B.C. Gerolomy used to be one of the best L series engine builders in professional racing. Major props there.
The only two serious builders left are Rebello and Sunbelt, but as I mentioned earlier, I don't know anyone that currently works at Sunbelt, so I can't attest to any of their current quality. Dave on the other hand is crankin' 'em out in Walnut Creek (10 miles from my house - I buy all my rebuild parts from him directly) as usual.
Last edited by lww; 05-15-2006 at 08:36 PM.
05-16-2006, 11:42 AM
#169
Registered User
Join Date: May 2006
Location: Eastern NC
Posts: 237
My 1981 ZX with an auto would float the front end at 135mph, but it felt like it still had more to go, I just couldn't keep the front tires down. The air damn under the nose was busted up from a P.O. so I think that might have been why.
05-16-2006, 01:09 PM
#170
More Than Meets The Eye
Join Date: Feb 2005
Location: Mesa, Az
Posts: 5,120
Yeah Friday night I took my '82 to over 5000rpms. And I had the needle buried for a short time. I am sure I was doing 130-140mph, and he kept climbing to do more. And also he didn't float, he stayed right on the ground, and was sailing along.
Last edited by WildmaN; 08-11-2006 at 03:34 AM.
05-17-2006, 08:08 AM
#171
Taste My Rainbow
Join Date: Feb 2006
Location: LOST VEGAS
Posts: 2,418
for all those who might be interested I came across a speedometer/odometer that has no cables just 3 wires and it connects through a gps system. the top speed showing on it is 160mph. when i get back home i'll look for the website again. not really sure if it will work on our cars but i bet there would be a way to rig them so we could.
08-10-2006, 08:14 PM
#172
Registered User
Join Date: Aug 2006
Location: N Carolina where the fine classics are!
Posts: 11
83 280zx turbo /350 chevy
Originally Posted by 280ZX_AV8R
His so called high power chevy 350 boat engine had been sitting and rusting for about five years before he put it in his car. I have experienced american V8 power and I would much rather have a turbocharged I-6 with fuel injection than a V8 with probably the same or less power and way less gas mileage. Any other info on top speed would be appreciated by anyone.
08-10-2006, 09:11 PM
#173
Originally Posted by ThreeJokers
Hey Thread : have a 87 Chevy blazer LT1 trick out 400 turbo tranny rated 480 and a 83 280zx turbo and did them together and 280 beat off but when it reach it at 112 the blazer got it at 117 and i was doing 128/130 but got me over that but temp started to rise to about 212 in the z and i pass my z at 138. if this will help.
You "did them together and the 280 beat off" ???? LoL...
