Short runner manifold
- Thread starter JustenGT8
- Start date
The 1UZFE EGR Delete Kit is available for sale here.
Isnt it the other way around... longer runners better for low end torque.
Positive pressure or not makes no difference to harmonics and the differences in pressure differential are relative so i expect to see very similar gains (relative) for both FI and NA.
Group Buy Time!!!
Looking from outside.. It sounds like you need a two step or some kind of pre stage anti lag.. It sounds like it doesn't make good power till 3 rd gear.. Thats where you are loosing time.. In 60Ft ..
Have same issue with my manual turbo...
Pre- stage / anti lag whatever ??
You'll be able to control power and actually be easier on trans with more power.. Sounds awsome on top end ... Third gear on...
4000GT
New Member
Isnt it the other way around... longer runners better for low end torque.
JustenGT8
New Member
Positive pressure or not makes no difference to harmonics and the differences in pressure differential are relative so i expect to see very similar gains (relative) for both FI and NA.
striker
New Member
looks prommising Justen,
you're absolutly right about the harmonics etc etc, the term boost fixes flow is something thought up after consuming a dozen kegs of beer, methinks.
why would audi have spend most of their R&D in the intake manifolds and tubing paths in both the audi R8 multiple le-mans winner twin turbo, and aslo in their r10 Diesel.......
keyword in keeping an engine together is "efficiency",
if you make 500hp with 10psi and you neighbour can do the same on 8psi, your neighbours engine will surfive longer than yours, and I bet you he's done more intake thinking/tuning than boost tweaking. better millage to, and smoother lines on the dynograph.
ps Come one justin put her on a dyno,
PS what did you do with the clutch problem eventually?
Grtz Thomas
you're absolutly right about the harmonics etc etc, the term boost fixes flow is something thought up after consuming a dozen kegs of beer, methinks.
why would audi have spend most of their R&D in the intake manifolds and tubing paths in both the audi R8 multiple le-mans winner twin turbo, and aslo in their r10 Diesel.......
keyword in keeping an engine together is "efficiency",
if you make 500hp with 10psi and you neighbour can do the same on 8psi, your neighbours engine will surfive longer than yours, and I bet you he's done more intake thinking/tuning than boost tweaking. better millage to, and smoother lines on the dynograph.
ps Come one justin put her on a dyno,
PS what did you do with the clutch problem eventually?
Grtz Thomas
JustenGT8
New Member
Too rioht Thomas...people don't seem to understand that 'boost' is on the same pressure continuum as the pressures NA engines see...they are just seeing a different part..... what we call boost is just pressures above sea level atm.
For example, boost starts earlier at higher altitudes as atm is lower. So, will a turbo induced 15psi (absolute) at 10,000ft behave any differently to the "NA" 15psi (1 atm) at sea level?
I just went with the evil triple plate clutch. Awesome once up and running and spins up like a bike engine It's settled down a little but still not streetable in traffic. I will try that UK mob you suggested once this one wears out....which will hopefully not be for a while
For example, boost starts earlier at higher altitudes as atm is lower. So, will a turbo induced 15psi (absolute) at 10,000ft behave any differently to the "NA" 15psi (1 atm) at sea level?
I just went with the evil triple plate clutch. Awesome once up and running and spins up like a bike engine
It's settled down a little but still not streetable in traffic. I will try that UK mob you suggested once this one wears out....which will hopefully not be for a while
spf_lexus
Active Member
Hey justin, how much time is involed w/ this mod? i mean... if i took out upper/lower plenums and had the aluminum tubing on hand could I do this myself? i would tack in place and have my local guy to the tig work. Anyway i would be very interested since i have FI now. Any guesstamations on possible gains?
JustenGT8
New Member
Still no dyno but the drags turned up some promising results. No traction on the street tyres so best ET was a woeful 12.1.....60ft not even close to dipping under 2 secs BUT trap speed improved by 5mph to 125mph. With some grip this would improve again,, at a guess out to 128mph....this on 11psi so LESS boost than what i was running on the stock manifold at 12.5psi.
Bodes well for the top end gain....takes a fair bit of extra grunt to see a 8mph gain in trap speed
Considering offers
Bodes well for the top end gain....takes a fair bit of extra grunt to see a 8mph gain in trap speed
Considering offers
Still no dyno but the drags turned up some promising results. No traction on the street tyres so best ET was a woeful 12.1.....60ft not even close to dipping under 2 secs BUT trap speed improved by 5mph to 125mph. With some grip this would improve again,, at a guess out to 128mph....this on 11psi so LESS boost than what i was running on the stock manifold at 12.5psi.
Bodes well for the top end gain....takes a fair bit of extra grunt to see a 8mph gain in trap speed
Considering offers
Group Buy Time!!!
JustenGT8
New Member
No chance John Far too time consuming. I have a guy doing some CAD design for me for a 'production' version but don't hold your breath as both he and i are swamped with other work at present.
I'm still keen to go with the VVTi setup so mixed enthusiasm to take this much further. Happy to sell or keep the one i'm currently running and there's the 2nd plate available for anyone who wants to try this themselves.....nothing particularly difficult,, just time consuming as alot of welding.
Far too time consuming. I have a guy doing some CAD design for me for a 'production' version but don't hold your breath as both he and i are swamped with other work at present. I'm still keen to go with the VVTi setup so mixed enthusiasm to take this much further. Happy to sell or keep the one i'm currently running and there's the 2nd plate available for anyone who wants to try this themselves.....nothing particularly difficult,, just time consuming as alot of welding.
JustenGT8
New Member
XR8tt
Active Member
Still no dyno but the drags turned up some promising results. No traction on the street tyres so best ET was a woeful 12.1.....60ft not even close to dipping under 2 secs BUT trap speed improved by 5mph to 125mph. With some grip this would improve again,, at a guess out to 128mph....this on 11psi so LESS boost than what i was running on the stock manifold at 12.5psi.
Bodes well for the top end gain....takes a fair bit of extra grunt to see a 8mph gain in trap speed
Considering offers
Looking from outside.. It sounds like you need a two step or some kind of pre stage anti lag.. It sounds like it doesn't make good power till 3 rd gear.. Thats where you are loosing time.. In 60Ft ..
Have same issue with my manual turbo...
Pre- stage / anti lag whatever ??
You'll be able to control power and actually be easier on trans with more power.. Sounds awsome on top end ... Third gear on...
JustenGT8
New Member
Nah not the case XR...it was all wheelspin 
Makes plenty power off the line and best 60ft has been a 1.7 (on street rubber). It's a very deceptive car and tall diff (2.92:1) makes it appear it's behaving quite sedately
With the Street ETs it'll do a 1.5 60ft easy...has pretty well full boost of the line and tall diff means engine loads up real quick
John, a lucky local based nearby in Syd.....soon to be a big single running in a SC400
Makes plenty power off the line and best 60ft has been a 1.7 (on street rubber). It's a very deceptive car and tall diff (2.92:1) makes it appear it's behaving quite sedately With the Street ETs it'll do a 1.5 60ft easy...has pretty well full boost of the line and tall diff means engine loads up real quick
John, a lucky local based nearby in Syd.....soon to be a big single running in a SC400
