| Page: |
| Home > Show Us Yours! > A couple of boosted Twin Kams | |||||||
|
1425 Posts Member #: 690 Post Whore Norfolk |
5th Mar, 2012 at 08:39:39pm
The last couple of engines I've built over the last few weeks have been pressure fed - thought you guys may be interested in the dyno's. Both engines are 1312's the non intercooled version is running lots of stock parts, stock head, LT 254° cams,road exh manifold, 10.2:1 comp, max boost was 4.5 psi at 6.5k. The sportier one is running RS 284° cams, 10:1 comp, ported head, race exh manifold 14psi at 7k, this one is running 6 inch rods and custom forged pistons as well. The conversion kit and charger is the same for both, pulley size altered to achieve boost/power targets.
If Carling made Mini engines
|
||||||
 2057 Posts Member #: 9252 Post Whore Cleethorpes |
5th Mar, 2012 at 08:43:58pm
nice figures Done now needs redoing lol |
||||||
 8297 Posts Member #: 408 Turbo Love Palace Fool Aylesbury |
5th Mar, 2012 at 08:44:25pm
Blimey not a bad result at all!
https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel
|
||||||
|
1425 Posts Member #: 690 Post Whore Norfolk |
5th Mar, 2012 at 08:51:28pm
yes Matty, they both use the same mid size Rotrex If Carling made Mini engines
|
||||||
|
122 Posts Member #: 2023 Advanced Member nr Portsmouth ,Hampshire |
5th Mar, 2012 at 08:56:41pm
Hi John, how do you think his would translate on a short stoke big bore 73.5mm bore 59.9mm stroke 1000cc ? thanks |
||||||
|
1425 Posts Member #: 690 Post Whore Norfolk |
5th Mar, 2012 at 09:11:38pm
Very well, a typical RS cammed twink runs 140/145hp at 7k, this has piled another 100hp on that total at 1bar. For a short stroke I'd rev it harder and make slightly less boost, I'd also run our 296 deg cams as these charged engines love the cams like a hot n/a. If Carling made Mini engines
|
||||||
|
4304 Posts Member #: 1321 Post Whore Wiltshire |
5th Mar, 2012 at 09:13:26pm
If charge temps were kept reasonable would running 20psi on 9.5:1 compression be out the question on these heads, of course assuming charge temps are kept reasonable? There seems to be some fairly high comp ratios going on here.
On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
||||||
|
4304 Posts Member #: 1321 Post Whore Wiltshire |
5th Mar, 2012 at 09:21:43pm
Ok the reason I ask is not just speculative
Edited by minimole23 on 5th Mar, 2012. On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
||||||
 4890 Posts Member #: 1775 Post Whore Chester |
5th Mar, 2012 at 09:24:43pm
intresting. looks good power. Are the cams low overlap jobs? I run a supercharger and I don't care the TB is on the wrong side.
|
||||||
|
1425 Posts Member #: 690 Post Whore Norfolk |
5th Mar, 2012 at 09:27:59pm
I wouldn't run 20psi on a 9.5:1comp ratio, but then again I don't think you would need to run that much boost if you are going to cam the motor to rev it hard and make big numbers. If Carling made Mini engines
|
||||||
|
1425 Posts Member #: 690 Post Whore Norfolk |
5th Mar, 2012 at 09:30:06pm
Nope, as mentioned these motors are cam monsters like hot n/a motors, we did start with very low overlap but soon swung back to n/a spec cam timing If Carling made Mini engines
|
||||||
|
4304 Posts Member #: 1321 Post Whore Wiltshire |
5th Mar, 2012 at 09:36:59pm
Thats easy then, start with the 3.8cc gasket, if 15psi doesn't deliver the goods then change it for the thicker one and up the boost. I have a k1100lt head and a k1200rs heads to to raid cams from so that covers that base.
On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
||||||
|
4890 Posts Member #: 1775 Post Whore Chester |
5th Mar, 2012 at 09:53:53pm
On 5th Mar, 2012 johnK said:
Nope, as mentioned these motors are cam monsters like hot n/a motors, we did start with very low overlap but soon swung back to n/a spec cam timing I run a supercharger and I don't care the TB is on the wrong side.
|
||||||
|
45 Posts Member #: 9836 Member Bournemouth |
5th Mar, 2012 at 09:56:02pm
On 5th Mar, 2012 johnK said:
I wouldn't run 20psi on a 9.5:1comp ratio, but then again I don't think you would need to run that much boost if you are going to cam the motor to rev it hard and make big numbers. true for a supercharger but for a GT20 turbo the overlap on the cams would affect the dynamic compression ratio and you'd loose a lot of low end even with a smaller turbo and the ignition advanced Youd be better off with a std exhaust with a 296 inlet and wind the boost up, as long as you can keep the inlet temps low enough Revving hard isnt always the answer too, you gain power but loose torque Turbo'ing the rover k series since 2010 |
||||||
|
8297 Posts Member #: 408 Turbo Love Palace Fool Aylesbury |
5th Mar, 2012 at 09:57:04pm
On 5th Mar, 2012 johnK said:
I wouldn't run 20psi on a 9.5:1comp ratio, but then again I don't think you would need to run that much boost if you are going to cam the motor to rev it hard and make big numbers. John does this just apply to the supercharger setup or turbo aswell? Ive found that mine seems to take pretty much any boost ive thrown at it. The most ive run is 35psi for a short spell but generally I run 25psi on a 9.0:1 CR. Ive been thinking of upping the CR and keeping the same boost (25psi) to keep inlet temps down but get the power up. :) https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel
|
||||||
 3074 Posts Member #: 1348 Post Whore wakefield West Yorks |
5th Mar, 2012 at 10:40:24pm
Very nice john.
|
||||||
|
1226 Posts Member #: 9271 Post Whore Stoke on Trent |
5th Mar, 2012 at 11:09:07pm
I've never been on the sc site before tonight, but if I was rich id spend a fortune on there, some really nice stuff. one day boost will be mine!
On 10th Mar, 2012 Joe C said:
TBH peple stick it everywhere... and theres merits to each... |
||||||
 684 Posts Member #: 9590 Post Whore Derby |
5th Mar, 2012 at 11:15:46pm
This makes me want to smash a turbo on mine! Matt W
On 14th Mar, 2012 mw3 said:
Got a nice big delivery from Carl at Force Racing today. |
||||||
|
1425 Posts Member #: 690 Post Whore Norfolk |
5th Mar, 2012 at 11:19:15pm
The LT cammed motor,
If Carling made Mini engines
|
||||||
 3756 Posts Member #: 1709 I like granny porn. LONDONSHIRE |
6th Mar, 2012 at 11:47:37pm
Love it, once ive sold my Fiat 500 il be coming up...... On 2nd Oct, 2009 Vegard said:
On 1st Oct, 2009 Jimster said:
I bet my first wank came quicker than your first mini turbo These new modern turbos with their quick spool up time, would make the competition harder. On 15th Aug, 2011 robert said:
phew!!! thank you brett for smashing in my back doors .( not something i imagined writing... EVER) |
||||||
|
4304 Posts Member #: 1321 Post Whore Wiltshire |
7th Mar, 2012 at 07:48:10pm
On 5th Mar, 2012 mw3 said:
This makes me want to smash a turbo on mine! Yes, do it! Edited by minimole23 on 7th Mar, 2012. On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
||||||
 16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
7th Mar, 2012 at 08:20:58pm
On 6th Mar, 2012 rubicon said:
il be coming up......  Coming up who? On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it 
|
||||||
 1183 Posts Member #: 6926 Post Whore Accrington |
7th Mar, 2012 at 09:14:47pm
which rotrex supercharger do you use? i wanted to get one ages ago, and i may still upgrade to one soon. |
||||||
| Home > Show Us Yours! > A couple of boosted Twin Kams | |||||||
|
|||||||
| Page: |