Hi All,
I'm considering putting the 2.0 Ltr turbo motor into my oval track car. Will the motor take the constant revving all day?
Motor Endurance
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mario_200sx
- 200SX Maniac
- Posts: 2507
- Joined: Fri Dec 14, 2007 9:16 am
- Car: S13
- Location: Cape Town
-
mario_200sx
- 200SX Maniac
- Posts: 2507
- Joined: Fri Dec 14, 2007 9:16 am
- Car: S13
- Location: Cape Town
-
mario_200sx
- 200SX Maniac
- Posts: 2507
- Joined: Fri Dec 14, 2007 9:16 am
- Car: S13
- Location: Cape Town
, yip!My dad raced in Goodwood showgrounds for years! 3 times Western Province colours + 2 or 3 time RSA colours....and a few club champion wins in the good old days. He use to give Jessy Hugget a very hard time!
Im a bit stuck on time now, however I will give you a few pointers today still.....
Rolling Thunder..........
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mario_200sx
- 200SX Maniac
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- Joined: Fri Dec 14, 2007 9:16 am
- Car: S13
- Location: Cape Town
OK, you are gonna sit with a few issues when running a turbo motor on a oval track.
Most oval tracks are only 700meters in total, this includes your corners. Now you will probably be running in second or third gear, dpending on your ratio.
No this makes it very difficult for spooling a decent size turbo. Cause you are gonna sit with little power out if the corner and with loads mid way through. If you opt for a smaller turbo you can just as well run a modified N/A motor...it will give you more power!
Now if you where gonna run tar oval it would have been beter because you would have been able to use your power more effectively at the clipping point out of the corner.
Now with gravel it will be a different story, on gravel you want most of your power coming out of the corner at lower revs and as much traction as possible out of the apex.
S20DET (turbo charged) is only really affective after 4000rpm, I know this because I owned with a stock turbo.
Other problem will be rev limit, on a oval track most motors rev till about 8000rpm - 8500rpm. Your SR20 motor will need some proper headwork if you want it to last. Its not like a road car where your rev it 8000rpm every now anfd then, its a constant bash of 8000 - 8500rpm at the end of every straight for 15 - 20 laps!
Next up will be cooling, you dont reach massive speads on our small ovals here in South Africa, espescially gravel. On the tar tracks its beter, most super modifieds probably clock about 130-140km/h before braking for the corner. This gives you a very short span (only the straights) for cooling, so effictively you will need to have the same type of cooling setup as the drift cars (probaly even better). They only drift for a short sprint at a time! You have to be prepaired to do 20 laps (nationals)!
Thus also causes another headache when doing gravel racing...rocks and dust! Where will you put your intercooler so thats its effective, however still kept out of harms way of the rocks and gravel! Same with the oil cooler and radiator.
If yoy look at gravel cars, you will see the pounding they take in the front from the rocks and gravel! A intercooler and oil cooler will not last a race! So you will need to plan smartly there!
My last concern would be how a filter would live up to the dust on a gravel track? I almost want to say that a N/A car should be fine, however a delicate thing as a turbo? Dont know if it will last.
Hope I helped you a bit, I didnt concentrate on the SR20DET motor alone but on running a turbo motor in whole.
Last motor my dad used was a 2L opel motor, running sides and meth. Did 15 sec flat laptimes around the oval. Motor made close to 180kw (N/A motor!).
The Skyline L20 motors can be made just a good and will probably work out cheaper! With the rules of allowing to increase engine displacement by 10% (last time I checked the rules) you can run a 2.2l motor.
Most oval tracks are only 700meters in total, this includes your corners. Now you will probably be running in second or third gear, dpending on your ratio.
No this makes it very difficult for spooling a decent size turbo. Cause you are gonna sit with little power out if the corner and with loads mid way through. If you opt for a smaller turbo you can just as well run a modified N/A motor...it will give you more power!
Now if you where gonna run tar oval it would have been beter because you would have been able to use your power more effectively at the clipping point out of the corner.
Now with gravel it will be a different story, on gravel you want most of your power coming out of the corner at lower revs and as much traction as possible out of the apex.
S20DET (turbo charged) is only really affective after 4000rpm, I know this because I owned with a stock turbo.
Other problem will be rev limit, on a oval track most motors rev till about 8000rpm - 8500rpm. Your SR20 motor will need some proper headwork if you want it to last. Its not like a road car where your rev it 8000rpm every now anfd then, its a constant bash of 8000 - 8500rpm at the end of every straight for 15 - 20 laps!
Next up will be cooling, you dont reach massive speads on our small ovals here in South Africa, espescially gravel. On the tar tracks its beter, most super modifieds probably clock about 130-140km/h before braking for the corner. This gives you a very short span (only the straights) for cooling, so effictively you will need to have the same type of cooling setup as the drift cars (probaly even better). They only drift for a short sprint at a time! You have to be prepaired to do 20 laps (nationals)!
Thus also causes another headache when doing gravel racing...rocks and dust! Where will you put your intercooler so thats its effective, however still kept out of harms way of the rocks and gravel! Same with the oil cooler and radiator.
If yoy look at gravel cars, you will see the pounding they take in the front from the rocks and gravel! A intercooler and oil cooler will not last a race! So you will need to plan smartly there!
My last concern would be how a filter would live up to the dust on a gravel track? I almost want to say that a N/A car should be fine, however a delicate thing as a turbo? Dont know if it will last.
Hope I helped you a bit, I didnt concentrate on the SR20DET motor alone but on running a turbo motor in whole.
Last motor my dad used was a 2L opel motor, running sides and meth. Did 15 sec flat laptimes around the oval. Motor made close to 180kw (N/A motor!).
The Skyline L20 motors can be made just a good and will probably work out cheaper! With the rules of allowing to increase engine displacement by 10% (last time I checked the rules) you can run a 2.2l motor.
Rolling Thunder..........
-
mario_200sx
- 200SX Maniac
- Posts: 2507
- Joined: Fri Dec 14, 2007 9:16 am
- Car: S13
- Location: Cape Town
The problem with that engine is the dizzy is on the rear and the inlet manifold faces the wrong direction.
See here
http://www.sr20forum.com/group-buys/149 ... trans.html
So in short no, the rwd sr box will not bolt straight on.
There are options like getting an adapter plate made.
Or you could get a SR20DET bottom end and bolt up the vvl head to it then you can use the rwd sr box. See this kit:
http://www.mazworx.com/index.php?l=prod ... ail&p=3136
I'd love to do that conversion so that I could rev the tits off my sr reliably...just dont have the cash!
See here
http://www.sr20forum.com/group-buys/149 ... trans.html
So in short no, the rwd sr box will not bolt straight on.
There are options like getting an adapter plate made.
Or you could get a SR20DET bottom end and bolt up the vvl head to it then you can use the rwd sr box. See this kit:
http://www.mazworx.com/index.php?l=prod ... ail&p=3136
I'd love to do that conversion so that I could rev the tits off my sr reliably...just dont have the cash!
