^i wouldn't be surprised if more aggressive cams just amplified the low-end loss w/LTH

 

Yes I did and Paul has no idea why the lowend drop. Could be that I'm 5at or something else who knows.

I did notice the step on the DE headers is located differently than their 370z LT. The step location on the 370z headers is similar to SG's close to the heads on or before the 1st bend of the primaries.

SG's dyno showed a dip in the lowend but for only a few rpm in almost the same area.

Post pics when you get them and like I said since your 6mt you can launch higher than the drop.

I hope all this doesn't steer people away the headers make power especially in the mid-range.

If I didn't drag race so much I wouldn't mind the lowend loss so much, but I need that since I can't rev higher than 2200 to launch.

I want to see a 6mt dyno.

 

Tony here is better picture of my cipher log on the below dyno. Car is floored at 3025 TP goes up to 3.99 and stays there until 4300 except for the blip at 4k which you can see on the dyno sheet. TP stays at 4.12 after 4300.

I also noticed my timing stayed at 30-32 during the while drop and then went down to 29-27 when power started to climb.

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There is a loss of ~30TQ @ 3900 RPM. I don't get the impression its due to the 0.1V.

Have you asked PPE what they think?

 

Agreed with Hydrazine.

Electronics like this will always have a normal variance of about +/- 5% for voltage, which is considered normal. The voltage never stays at the exact same level all the time.

 

They don't know why. Don't you think it would be lower through out the powerband if header design?

During your tests did yours pick up, drop, then pick up again.

Who knows what percentage the throttle is open between 3.98v and 4.12v.

 

Did PPE do their own dynos and get different results? It would reveal a lot if they had completely different results.

You do have entirely different cams....

I get the impression that the dyno results are real and related to the tube resonance tuning but if this is the only dyno in existence for them we can't be sure.

 

When I did the R&D testing for the ART pipes, I saw all kinds of weird, interesting and incredible results.
All over the place.

The side branch resonator on the ART pipes can have huge effects (+or-) on the power curve depending on how it is tuned and constructed.

 

I'm the 1st only DE their 370z LTH did not have a lowend drop, but they are made different.

 

While working in Charlotte i stopped by CIN tuning to see what they can do about the dip in power and thoughts.

CIN said the same thing as RT Tuning and Hydrazine it's most likely the header/ cam combo. CIN was able to smooth it out a little with some gains.

I plan on keeping them I'm just going to add a high stall converter. I love the added midrange and topend.

PR Driver here a dyno comparing my numbers to a stock 5at.



CIN tuned dyno car feels alot different launching. The car ran 13.4 on the dyno when I got there with a 1.6 60ft. After was 13.04 with a 1.6 60ft.

 

What cams do you have again?

 

He has JWT S1 cams

 

287whp 275wtq??? reading that right?? sorry im on my phone not a computer

 

Yeah it actually 253tq the high torque at first is from my converter. I remember my dynos at CAT in socal the tq hit hard then dropped down to normal.

I have to send this dyno to PPE also to see what the they think the issue is. I think it's the step location or the piping diameter.

My momentum headers were 1 3/4 as is most headers.

SD how are you liking the cams so far? I think I'm going to get the aluminum DS need money for the converter.

 

your horsepower is nice.......do u think i'll hit that if i get cams??


my numbers now is 262whp/250wtq i had the headers tuned by another person jus to try out but my normal tuner guy says he can get more...we'll see.