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Coheed's Posts

All posts made by Coheed

Coheed's Posts
- All posts made by Coheed
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Thread: Tires for Boost
Post: It is a double edge sword. I like the taller tires becaus...
It is a double edge sword. I like the taller tires because they give you better traction in lower gears, but they can take away some of the thrills in the higher gears. (gearing).
2009-02-24 05:17
Thread: Tires for Boost
Post: ^^^^ This was my solution, get a larger diameter tire and...
^^^^ This was my solution, get a larger diameter tire and you increase the contact patch as well. The larger diameter helps with traction more than the contact patch. Larger tire lenghtens the gear...
2009-02-24 05:00
Thread: Tires for Boost
Post: Really? You serious? What I really mean, is a wider ti...
Really? You serious?

What I really mean, is a wider tire doesn't necessarily mean more grip. If you look into the total friction you will notice that the total resistance to movement is based on...
2009-02-24 01:14
Thread: Engine Rebuild crank wont rotate
Post: With the ARP studs you will need to line hone the main ca...
With the ARP studs you will need to line hone the main caps. Take your block to a machine shop and have them do it for you. Using the ARP studs will distort the caps/block slightly and cause the be...
2009-02-24 00:57
Thread: Air 2 Water Heat Exchangers
Post: I am going to use a heat exchanger that is about the same...
I am going to use a heat exchanger that is about the same size as my AC condensor. Then I am going to do some fancy work to get the air to force its way though the cores. I am going to try and keep...
2009-02-24 00:46
Thread: Tires for Boost
Post: I keep trying to tell people that wider tires don't mean ...
I keep trying to tell people that wider tires don't mean more grip. But in a rubber tire the bigger the contact patch, the less heat (in most cases). The #1 variable in changing the coefficient of ...
2009-02-24 00:27
Thread: Iridium pllug gap?
Post: You will be fine, but plug life will be shortened signifi...
You will be fine, but plug life will be shortened significantly. The tip is iridium and is the part that sees the most wear. If the tip is broken off, it will still fire just fine, but won't last n...
2009-02-24 00:13
Thread: Iridium pllug gap?
Post: I've run as high as .032 on mine up to about 23psi before...
I've run as high as .032 on mine up to about 23psi before it started breaking up. NGK BKR7EIX. They worked pretty good, until one of the ceramics cracked on one. lol.
2009-02-23 05:49
Thread: Size x Rpm
Post: I like to rev high as long as the top end can handle it. ...
I like to rev high as long as the top end can handle it. You can make more power on less displacement this way. HP is all that matters. When and how much. TQ is not a derivative of work being accom...
2009-02-23 02:16
Thread: n/a cams with t25g - too much overlap for small turbo ?
Post: In essence it doesn't make much sense to use a big cam wi...
In essence it doesn't make much sense to use a big cam with a small turbo. You can make more power, but if it shifts the powerband too high in the rpm range, then you can lose power all-around as w...
2009-02-23 02:09
Thread: n/a cams with t25g - too much overlap for small turbo ?
Post: The main reason overlap isn't desireable in a boosted app...
The main reason overlap isn't desireable in a boosted application is because of reversion. The excessive backpressure will cause a dillution of the intake charge while both valves are open (overlap...
2009-02-22 02:34
Thread: miami sentra vs 500WHP cobra 10 seond car
Post: ya, the dash doesn't condone street racing. Oh poop. Half...
ya, the dash doesn't condone street racing. Oh poop. Half my videos are on the street, but the threads they are posted in aren't locked.
2009-02-21 03:31
Thread: miami sentra vs 500WHP cobra 10 seond car
Post: I raced a 530whp cobra in my sentra and pulled similarly....
I raced a 530whp cobra in my sentra and pulled similarly. But it wasn't a 10sec car. best time up here was 11.3 i think. I ran another buddy on low boost (he makes 510whp 03 cobra) and we were dead...
2009-02-21 03:30
Thread: n/a cams with t25g - too much overlap for small turbo ?
Post: the stock manifold is a divided design so you shouldn't h...
the stock manifold is a divided design so you shouldn't have problems.
2009-02-21 02:42
Thread: Mixing tranny fluid with engine oil
Post: Please don't do that. ATF in the gas take will plug your ...
Please don't do that. ATF in the gas take will plug your injectors and damage them. I wouldn't recommend that. I have a lot of customers come in buying new parts from the ATF damaging things. Pumps...
2009-02-21 02:27
Thread: Rod/Stroke Ratio and its effect on power
Post: Very good read. I like you taking the time to explain the...
Very good read. I like you taking the time to explain the flame front speed in your description. 50cm/sec is the "typical" speed but this can be changed due to fuel being used, temp, and pressure. ...
2009-02-21 01:11
Thread: Time for a new "TRUE 2.0L RADIATOR" which one should I get?
Post: Get nice duct-work on an NX radiator and you shouldnt hav...
Get nice duct-work on an NX radiator and you shouldnt have any problems overheating. The Koyo rad is the one to get but unfortunately doesn't leave room for much of anything.
2009-02-21 00:54
Thread: Mixing tranny fluid with engine oil
Post: please do not ruin your engine by actually driving it wit...
please do not ruin your engine by actually driving it with ATF. It has high detergents, but the flash point is a lot lower than oil so it burns more easily. This can ruin the cat yada yada.

Only...
2009-02-21 00:47
Thread: Known cold plugs (NGK BKR7) with removable contact tip?
Post: No no no. You misunderstood. The small end (for the coil ...
No no no. You misunderstood. The small end (for the coil pack) is removable on most NGK plugs. ALL plugs over 7 should have the removable tip.

On the end that goes into the block: sometimes it ...
2009-02-20 14:21
Thread: Rod/Stroke Ratio and its effect on power
Post: Thank you for that post snickers. Saved me the math. Tha...
Thank you for that post snickers. Saved me the math. That is quite a difference in piston speed between the two engines. Perfect explanation on why those 1.6L cams don't work the best in the 20ve.
2009-02-20 14:15
Thread: Rod/Stroke Ratio and its effect on power
Post: It could. I think the r/s ratio for the DET is a little h...
It could. I think the r/s ratio for the DET is a little higher than that though. I havn't checked it. And the 16ve looks a lil high. I thought it was in the neighborhood of 1.7-1.8?

R/S ratio wi...
2009-02-20 04:19
Thread: Best time
Post: ^^^^^^^ What he said. You want to shift where you have th...
^^^^^^^ What he said. You want to shift where you have the best compromise of avg hp and torque multiplication at the wheels.

For instance, find out how far your rpms drop when you shift. Find ...
2009-02-20 04:14
Thread: Known cold plugs (NGK BKR7) with removable contact tip?
Post: Napa gets my plugs for me. They are the normal BKR7E plug...
Napa gets my plugs for me. They are the normal BKR7E plugs and have the removable tip. You could go for the heat range 9 if they are available, but most only come in the 12 or 10mm thread for motor...
2009-02-20 04:10
Thread: Finally getting dyno'd SR20VE-T
Post: what size exhaust are you running? I would go open dp on ...
what size exhaust are you running? I would go open dp on that thing and see what happens.
2009-02-19 14:11
Thread: Finally getting dyno'd SR20VE-T
Post: my VE-T felt like poo until I swapped to the VET cams. Pe...
my VE-T felt like poo until I swapped to the VET cams. Perhaps there are some easy gains to be had.
2009-02-19 05:16
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