NA Bridge port/ Peripheral port Dyno sheet
10-06-09, 10:08 PM
#76
was retarded, now stupid
Join Date: Aug 2002
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A carburator is a scientifically calibrated device designed to deliver the Wrong amount of fuel at a given moment, in anticipation of the next - David Vizard (writes alot of engine tuning books)
I thought it was a funny quote and worth the bucket of gasoline to throw on the fire
I thought it was a funny quote and worth the bucket of gasoline to throw on the fire
10-06-09, 10:52 PM
#77
A carburator is a scientifically calibrated device designed to deliver the Wrong amount of fuel at a given moment, in anticipation of the next - David Vizard (writes alot of engine tuning books)
I thought it was a funny quote and worth the bucket of gasoline to throw on the fire
I thought it was a funny quote and worth the bucket of gasoline to throw on the fire
10-14-09, 12:05 PM
#80
Old [Sch|F]ool
(did I do that right?)
coming in? no ... wait ... incoming ....
10-14-09, 08:53 PM
#84
Old [Sch|F]ool
If you want efficiency, get a carb.
If you want to be cheap and get the tuning right in the space of minutes instead of hours and many jets and gaskets and such, go EFI.
Seriously, I went EFI because I'm cheap. I miss the fuel economy though.
If you want to be cheap and get the tuning right in the space of minutes instead of hours and many jets and gaskets and such, go EFI.
Seriously, I went EFI because I'm cheap. I miss the fuel economy though.
10-14-09, 09:40 PM
#85
Scott Howard
Here is some new video of my rx7 at Buttonwillow. It has a MOTEC EFI with a small BP 13B.
Buttonwillow: 6 total
http://www.vimeo.com/7074917
http://www.vimeo.com/7075241
http://www.vimeo.com/7075589
Fontana: 2 total (they are longer)
http://www.vimeo.com/5950934
http://www.vimeo.com/5950934
Buttonwillow: 6 total
http://www.vimeo.com/7074917
http://www.vimeo.com/7075241
http://www.vimeo.com/7075589
Fontana: 2 total (they are longer)
http://www.vimeo.com/5950934
http://www.vimeo.com/5950934
10-16-09, 03:50 PM
#86
Here is some new video of my rx7 at Buttonwillow. It has a MOTEC EFI with a small BP 13B.
Buttonwillow: 6 total
http://www.vimeo.com/7074917
http://www.vimeo.com/7075241
http://www.vimeo.com/7075589
Fontana: 2 total (they are longer)
http://www.vimeo.com/5950934
http://www.vimeo.com/5950934
Buttonwillow: 6 total
http://www.vimeo.com/7074917
http://www.vimeo.com/7075241
http://www.vimeo.com/7075589
Fontana: 2 total (they are longer)
http://www.vimeo.com/5950934
http://www.vimeo.com/5950934
01-12-10, 09:20 AM
#89
Been here since dirt...
Join Date: Jan 2009
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01-12-10, 12:16 PM
#90
Yes i agree with rotorgodd ,but lets not forget ,it all depends on budget ,and experience!For a street N/A screemers or low budget build carbys are not to bad!!!!!!!!!!!! Even some HI HP builds but has to be done right! Also prefrence ,EFI is by far your best bet to get the most HP & fine tuning,jet changin etc......As for PR drag cars not all are under weight !but pound for pounda hand full of them Island boys make **** work with very little!Proven fact,last your aplication should determine what set-up to go with ,i have a 13b-PP 58mm weber,Nitrious full body 2,278lb car 9.01@148mph consistent! 5.6@117mph 1/8mile
giving them EFI guys a runn for their $$$
giving them EFI guys a runn for their $$$
Now a buddy did the carb conversion on a s4 n/a stockport looking to test for gains. He saw a little difference in top end but in the end the driveability and economy won the nod to return to factory efi. Mind you he wasn't tuning by a wideband and didn't have the 25+ years of carb experience i have. Nonetheless, it was a waste of time in my eyes.
For my application the carb is ideal, the raw fuel mixed with premix does wonders to lubricate my camden. When I upgrade to a turbo setup, it will have to be efi though.
03-20-10, 04:19 PM
#92
Senior Member
Yesterday i was on the Superflow dyno again. This time with Jenvet 50 mm throttle bodies compared to the 55 mm TWM throttle bodies i tested in January. My hope was to gain more torque and some more hp, but was i dissapointed! I lost 18 hp with the 50 mm tbs and 8 ft/lb
I also had big knock and ping at 9000+ rpm with only 22L and 3 deg split. Engine has RX-8 10:0 rotors. Now my question is,could the MSD 100 ohm/ft cause crossed triggering leading and trailing and the problems with knock? Went back to 21L and split 5 degree and no knock. Have read that most BP and PP engines like 24-27 L, but not this engine
Oh must mention that with 55 mm tb power was 320 hp and with 50 mm tb 302 hp but with correct fuel curve and a fuel additive to the V power 99 fuel 310 hp@9600 rpm was observed.
More testing on Monday with different exhaust headers diameters and lenghts. And the engine has a 3" HJS cathalyst and one rear silencer
/Lasse
I also had big knock and ping at 9000+ rpm with only 22L and 3 deg split. Engine has RX-8 10:0 rotors. Now my question is,could the MSD 100 ohm/ft cause crossed triggering leading and trailing and the problems with knock? Went back to 21L and split 5 degree and no knock. Have read that most BP and PP engines like 24-27 L, but not this engine Oh must mention that with 55 mm tb power was 320 hp and with 50 mm tb 302 hp but with correct fuel curve and a fuel additive to the V power 99 fuel 310 hp@9600 rpm was observed. More testing on Monday with different exhaust headers diameters and lenghts. And the engine has a 3" HJS cathalyst and one rear silencer
/Lasse
03-22-10, 10:48 AM
#93
Scott Howard
Yesterday i was on the Superflow dyno again. This time with Jenvet 50 mm throttle bodies compared to the 55 mm TWM throttle bodies i tested in January. My hope was to gain more torque and some more hp, but was i dissapointed! I lost 18 hp with the 50 mm tbs and 8 ft/lb I also had big knock and ping at 9000+ rpm with only 22L and 3 deg split. Engine has RX-8 10:0 rotors. Now my question is,could the MSD 100 ohm/ft cause crossed triggering leading and trailing and the problems with knock? Went back to 21L and split 5 degree and no knock. Have read that most BP and PP engines like 24-27 L, but not this engine Oh must mention that with 55 mm tb power was 320 hp and with 50 mm tb 302 hp but with correct fuel curve and a fuel additive to the V power 99 fuel 310 hp@9600 rpm was observed.
More testing on Monday with different exhaust headers diameters and lenghts. And the engine has a 3" HJS cathalyst and one rear silencer
/Lasse
I also had big knock and ping at 9000+ rpm with only 22L and 3 deg split. Engine has RX-8 10:0 rotors. Now my question is,could the MSD 100 ohm/ft cause crossed triggering leading and trailing and the problems with knock? Went back to 21L and split 5 degree and no knock. Have read that most BP and PP engines like 24-27 L, but not this engine Oh must mention that with 55 mm tb power was 320 hp and with 50 mm tb 302 hp but with correct fuel curve and a fuel additive to the V power 99 fuel 310 hp@9600 rpm was observed. More testing on Monday with different exhaust headers diameters and lenghts. And the engine has a 3" HJS cathalyst and one rear silencer
/Lasse
04-01-10, 02:52 PM
#95
for what it's worth, using Renesis rotors doesn't prove that he was using a Renesis. he alluded to it being either bridge or peripheral, which in and of itself doesn't prove anything either, but i think hints more to using Renesis rotors in an older-type 13B.
04-01-10, 04:01 PM
#96
Senior Member
Join Date: Nov 2008
Location: Czech republic
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Yesterday i was on the Superflow dyno again. This time with Jenvet 50 mm throttle bodies compared to the 55 mm TWM throttle bodies i tested in January. My hope was to gain more torque and some more hp, but was i dissapointed! I lost 18 hp with the 50 mm tbs and 8 ft/lb I also had big knock and ping at 9000+ rpm with only 22L and 3 deg split. Engine has RX-8 10:0 rotors. Now my question is,could the MSD 100 ohm/ft cause crossed triggering leading and trailing and the problems with knock? Went back to 21L and split 5 degree and no knock. Have read that most BP and PP engines like 24-27 L, but not this engine Oh must mention that with 55 mm tb power was 320 hp and with 50 mm tb 302 hp but with correct fuel curve and a fuel additive to the V power 99 fuel 310 hp@9600 rpm was observed.
More testing on Monday with different exhaust headers diameters and lenghts. And the engine has a 3" HJS cathalyst and one rear silencer
/Lasse
I also had big knock and ping at 9000+ rpm with only 22L and 3 deg split. Engine has RX-8 10:0 rotors. Now my question is,could the MSD 100 ohm/ft cause crossed triggering leading and trailing and the problems with knock? Went back to 21L and split 5 degree and no knock. Have read that most BP and PP engines like 24-27 L, but not this engine Oh must mention that with 55 mm tb power was 320 hp and with 50 mm tb 302 hp but with correct fuel curve and a fuel additive to the V power 99 fuel 310 hp@9600 rpm was observed. More testing on Monday with different exhaust headers diameters and lenghts. And the engine has a 3" HJS cathalyst and one rear silencer
/Lasse
04-10-10, 03:45 PM
#97
Senior Member
04-10-10, 03:48 PM
#98
Senior Member
04-10-10, 03:57 PM
#99
Senior Member
New combo on Monday did not gain any more hp unfortanately New PP engine to be testad in a few weeks
/Lasse
04-10-10, 11:34 PM
#100
Old [Sch|F]ool
My mild half-bridge made more torque at 3200 than the street port made at peak.
Same engine, same ports except for the added eyebrow, and I switched intake manifolds because the engine actually lost power everywhere with the TII manifold.
The engine only made 175whp peak. But, it did that at 6800rpm
Same engine, same ports except for the added eyebrow, and I switched intake manifolds because the engine actually lost power everywhere with the TII manifold.
The engine only made 175whp peak. But, it did that at 6800rpm