Looking for ported stock heads, intake and stock cam dynos

[tmoss]

I don't hink there too low, but I have seen more. The qaulity of the porting makes a difference.

 

[90Notch]

The qaulity of the porting makes a difference.

As does the amount of porting, a valve job and some tuning. Next dyno is going to be a swap to Street Heat intake, then tune with EEC to see what both can do.

 

[tmoss]

As does the amount of porting, a valve job and some tuning. Next dyno is going to be a swap to Street Heat intake, then tune with EEC to see what both can do.

May work out well for you. Here's some feedback I just got where it did not, but the combo is different from yours - yours is more intake side restricted.....

From:"Robert Pearson" <[email protected]>
To:"Thomas Moss" <[email protected]>
Subject:Re: hey this is the dyno graph for the explorer
Date:Sat, 6 Nov 2004 22:18:06 -0500

hey man i gotta get u the dyno graph of the rpm 2 compared to the explorer
with your lower ported, all i can say is your intake kills the rpm 2 i
lost 24 ftlbs of torque and 7 hp and under the curve the performer rpm2
could not compete on horsepoaer or tq the intake is coming off u will see
more when i get the graphs on the same chart, oh and the explorer is going
back on u should have good info to post and this was with nothing else
changed ill definetly recommend your porting to people thanks

Robert
----- Original Message -----
From: Thomas Moss
To: Robert Pearson
Sent: Wednesday, October 20, 2004 10:50 PM
Subject: Re: hey this is the dyno graph for the explorer

Much appreciated - looking forward to the RPM graph.

Robert Pearson <[email protected]> wrote: well i dont have and
website or anything i dont know how to do all that stuff, lol here are
my mods

afr 165 emissions legal heads
1.6 roller rockers
explorer intake with your ported lower 70 mm tb
75 pro m maf calibrated for 19 pound injectors
sct chip with the calibraion for the 24 pound injectors
under drive pullys timing set at 14 degrees
p headers, with bassani off road x pipe flowmaster cat back
aod trans with wide ratio kit, shift kit 3200 pi converter soon to be
rasied someday
msd ignition
3.73 gears
electric fan kit

well i think thats everything i should have the intake on next weekend
the 30th best times so far are 12.77 @ 109.70 if u needed those
thanks man

Robert

 

[cleanLX]

Stock heads ported (stock vlv no vlv job)
stock intake (upper opening opened to match EGR / lower ported to stock gaskets & head)
stock cam dot to dot
stock MAF
65mm TB & 67EGR
stock rotating assembly (cleaned, home hone & re ring)
19lb inj
1 5/8" FMS shorties
2 1/2" OR H
2 1/2" Summit cat back
3.73

#'s are pretty much what I expected, what do you think they should have been?

I think with the stock MAM and shortie headers you are doing rather well.

 

[90Notch]

"May work out well for you. Here's some feedback I just got where it did not, but the combo is different from yours - yours is more intake side restricted....."

RPM against an Explorer is quite abit different than what I'm doing. Not to mention long term will see my TWs & 75mm Pro-M being added along with the Street Heat. I can't imagine that my stock intake will outperform the Street Heat even with setup I have now, time will tell. What I want to see is what effect the intake has over the stocker then see how much more I can pull out of combo with some tuning. On my stroker I made 30 more rwhp just from tuning with the EEC.

I've seen a dyno comparing a ported Cobra vs. RPM w/AFR165s where the owner made same comment that he loss torque in lower rpms but if you look at his a/f graph it is very clear that he lost the torque from poor tuning. His combo made peak power at 12.8:1 and once the RPM setup hit this it made more than the ported Cobra. Do you have a copy of the two graphs, I'd be very curious to see the tune on both.

 

[tmoss]

Just the first dyno with the Explorer intake which I have attached with his combo. By the way, this is with an AOD transmission, so FW numbers are a little higher than a 5 speed. He is going to send me the RPM2 dyno also.

 

[90Notch]

Thanks Tom but no need to the first dyno graph doesn't have the a/f on it so I doubt it will be of any help. I'm trying to locate the example I'm talking about to show you but I have no way to post it. The first dyno w/Cobra had an a/f of 12.8:1 right across entire range (which seems to be where most poeple make max power with these heads) then when he switched to the RPM the lower rpms are richer until 3k or 3.5k where a/f hits 12.8:1 again and stays there. When it does power levels never drop below cobras so I'm not convinced that the RPM hurt lower rpms. That's why I'm going to reinstall my EEC tuner to make sure a/f is the same for both tests so it's a decent comparison.

 

[stang2841]

with a heavily ported stock intake (upper & Lower) can you get 10-15rwhp?


how do you port a throttlebody?

 

[tmoss]

The first dyno w/Cobra had an a/f of 12.8:1 right across entire range (which seems to be where most poeple make max power with these heads) then when he switched to the RPM the lower rpms are richer until 3k or 3.5k where a/f hits 12.8:1 again and stays there.

Maybe the volume of air being deliverd into the cylinder is less than the Cobra in that rpm band and hence a richer mixture.