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-   -   Plenum & Injector Housing Porting (http://zr1.net/forum/showthread.php?t=28608)

jss06c6 10-31-2018 09:29 PM
Re: Plenum & Injector Housing Porting
 
Quote:
Originally Posted by Ccmano (Post 285610)
The engine is ported and you have headers, if I’m not mistaken your running stock flywheel. What exhaust do you have?

Mine is going to the Dyno later today with Doms latest tune. We can compare notes.
H
:cheers:
Yes to all. I am running stock FW now. Stainless Works exhaust.. headers through tips. 3" exhaust.

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jss06c6 10-31-2018 09:31 PM
Re: Plenum & Injector Housing Porting
 
Quote:
Originally Posted by XfireZ51 (Post 285627)
Steve,

Is this SAE?
Yes, SAE smoothed..

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Ccmano 10-31-2018 09:31 PM
Re: Plenum & Injector Housing Porting
 
Looks like we’re on the opposite side of the same boat. Mine was 364rwhp today but very lean. Doms going to add fuel and I’ll go back. With these mods we should be in the 390’s...
H
:cheers:

jss06c6 10-31-2018 09:35 PM
Re: Plenum & Injector Housing Porting
 
My techs believe I've got another 15-20 hp when I get the WOT fueling dialed in to 12.8-13.1. I was literally spitting raw fuel out the exhaust!

Going to dial back the PE and rerun next week when I've got some time to tune on the Dyno .

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XfireZ51 10-31-2018 10:14 PM
Re: Plenum & Injector Housing Porting
 
This was my dyno run w similar mods. I believe I had Magnaflow catback at this point.

jss06c6 11-14-2018 09:49 PM
Re: Plenum & Injector Housing Porting
 
1 Attachment(s)
Loaded 10% and Inertia pass. Inertia useless in my mind, but put it on the chart as well for giggles.. 369 rwhp loaded.. Like Dom's chart, it's impressive to see the engine carry the RWHP all the way to 7000 rpm!

XfireZ51 11-14-2018 10:03 PM
Re: Plenum & Injector Housing Porting
 
Quote:
Originally Posted by jss06c6 (Post 286309)
Loaded 10% and Inertia pass. Inertia useless in my mind, but put it on the chart as well for giggles.. 369 rwhp loaded.. Like Dom's chart, it's impressive to see the engine carry the RWHP all the way to 7000 rpm!
Yes this is a lovely characteristic of DOHC motors. They don’t crater after peak power as do “OHV” motors. Power stays flat. That’s a HUGE advantage.

Top Toy 11-15-2018 12:11 AM
Re: Plenum & Injector Housing Porting
 
What happened to your torque? Was 405 ft. lbs. when it was rich?

jss06c6 11-15-2018 08:45 PM
Re: Plenum & Injector Housing Porting
 
Quote:
Originally Posted by Top Toy (Post 286316)
What happened to your torque? Was 405 ft. lbs. when it was rich?
Dyno setup had some issues.. that's resolved now. The first pass last week was accurate on the HP, but our setup for torque value was off a bit.. Now corrected..

jss06c6 03-13-2019 08:20 PM
Re: Plenum & Injector Housing Porting
 
1 Attachment(s)
Have had some time to experiment with fuel and spark on the top end after porting #473. Slowly sneaking up on what the engine likes using an MD1100 dyno. Have eased in another 2-1/2 degrees between 5500 & 6500 @100 KPA. Max knock retard 0.5 degrees. My fuel cutoff is still sitting at 7,042. The torque is slowly rolling off, but HP is still climbing at 7,000. 406 rwhp, 374 rwtq. How far have you guys pushed fuel cutoff with a stock bottom end?[ATTACH]

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