More 10"converter testing (video)

[autotalon]

Big cams definitely make it harder to build boost. You can try more overlap like -2E +2I, and leaning it out at low boost helps make torque for getting on the converter.

 

[larrykoren]

Well it still built boost great and very fast once I got the timing worked out during spool up and the knock issue gone.

It got up to 5200rpms in about 4 sec on one log.

I was mainly saying how it doesnt hold as much boost with the larger cams, resulting in a slower time. And the airflow is the same or a couple lbs/min less with cams. I think the factory did a good job with their stock auto cams for the powerband on an auto with a 16g size turbo.

 

[yellowrs]

Son of a... Damn that's impressive. Congrats.

What slicks? M&H?

M&h 26x8.5x15

 

[GDNF2ET]

O

I ran a bunch of 10.8 and 10.9s today. My 60ft was the same as with the stock converter. High 1.4 and low 1.5. However my 1.4 times were 10.8 and 10.9 at best. WHich is a little slower. I really think it has to be the cams. I can only hold 29psi to redline with the kelford 272s. I was holding 33 psi to redline with the stockers. SO I dont really recommend the cams for the 16g. I know every other person in the world does, but im telling you it is slower, if only by a little and idle is much harder to dial in. FOr the 67mm the cams work great and I am revving to 9k with tons of power.

I can't help to think that the Kelfords and ported head don't like the stock manifold still being on there....

 

[larrykoren]

True, it is probably not ideal, and not setup for this turbo or IM. But It did feel great with the large turbo on there with the stock IM. But I am doing SMIM and nitrous in about a month or two.

Overall I would say in similiar weather I would have ran 10.75 with the setup and now its running 10/91 at best. So something, either cams, highstall converter, stage 3 head, ect, is the reason for the et loss and 5mph trap loss.

 

[Nate Crisman]

Larry, is it possible the 10" converter being looser and less efficient is causing some of the "at the wheels power loss" and resulting ET/mph loss rather than the cams/boost?

 

[larrykoren]

Yea I am guessing it is the looser converter that hurt my times (the .15 to .3 sec loss). But I dont feel the cams helped it at all. I dont think the loss would have been any greater with stock cams and I dont feel lie the cams did anything for the top end or power. A waste on the 16g if you ask me.

 

[Nate Crisman]

Yea I am guessing it is the looser converter that hurt my times (the .15 to .3 sec loss). But I dont feel the cams helped it at all. I dont think the loss would have been any greater with stock cams and I dont feel lie the cams did anything for the top end or power. A waste on the 16g if you ask me.

Granted, 14B, but last two times out my car ran identical: same 1.5 60', same 111.8mph, same 11.8 ET. Same tune, fuel, boost. First time out was with a ported head, SS valves, and GSC S2 cams. Second time out was a stock 2g head/cam set. It ran pretty much identical with the stock top end vs the expensive top end with the 14b turbo. I'd have no qualms putting stock parts on again since the car is going no bigger than 16g in the forseeable future.

Just another data point that agree's with your theory.

 

[Car Cannibal]

Larry your combos and times are getting hard to keep straight.

I can't tell if you're saying the cars running 4-5mph less due to with Kelfords alone, because it's holding 4psi less of total boost, or if it's because of the 10" converter?

Did the car run the 10.6 E.T. with 33psi or 29psi?
What cams were in the 10.6 combo, stock?

If it ran the 10.6 with 33psi, why even mention the looser converter when you state the Kelfords are only holding 29psi? There's your .4 along with possible ambient temp increase etc.

 

[larrykoren]

OK.

It ran 10.61, with completely stock longblock with stock auto cams, and l19 head studs and stock converter.
It then ran the best of 10.91 with the kelfords, stage 3 head, and high stall converter.

The 10.61 was with it holding 33psi. WIth the new setup it holds between 29-31psi. It fluctuates a little through the rpm range. I know when you get better flowing cams, you hold less psi to redline especially if the turbo is already maxed out. SO I do not know for sure if the cams hurt, BUT I do know they didnt help. As far as the converter goes, it is probably more of the culprit since it is very loose compared to stock and is probably too loose for the 16g. But It wasnt bought for my 16g setup. So I feel the new converter hurt the times, and I was stating the cams didnt help my setup I dont think.

The 4psi could be the reason too but I just think its down on psi because it is flowing a little better but I think it is still backed up in the turbine housing anyway.

Here is a video of my 67mm with this converter. This run was the worst 1/4 time, but it had identical 60ft to the one I ran 12.8@129. So this is to show how I still need nitrous and the high stall isnt enough which I knew. ANd this is why I have the 68hta on it because I couldnt deal with a launch like that even if it was great from a roll. ‪SDV 0219‬‏ - YouTube

Here are the runs with the new converter, cams, head, engine ect with the 68hta back on.
‪SDV 0220‬‏ - YouTube
‪SDV 0226‬‏ - YouTube
‪SDV 0221‬‏ - YouTube
‪SDV 0227‬‏ - YouTube
‪SDV 0224‬‏ - YouTube

 

[blazinglaser_90]

I just got my converter the other day here is my first test video

this is a t4 gt37r from full race with a 0.96 AR housing launching on a 100 shot
i see 3400 - 3500 rpms on the foot brake and i'd say high 4000's to low 5000's when i hit the nitrous

here is the video of me trying it out for the first time

<iframe width="480" height="390" src="http://www.youtube.com/embed/qDoLu9ddnkU" frameborder="0" allowfullscreen></iframe>

 

[warp9]

I just got my converter the other day here is my first test video

this is a t4 gt37r from full race with a 0.96 AR housing launching on a 100 shot
i see 3400 - 3500 rpms on the foot brake and i'd say high 4000's to low 5000's when i hit the nitrous

here is the video of me trying it out for the first time

<iframe width="480" height="390" src="http://www.youtube.com/embed/qDoLu9ddnkU" frameborder="0" allowfullscreen></iframe>

Nice man..Now sell it to me

 

[icwicked]

nice car dude!!! at first i thought it had a v8 in is kuz the first two races thats all u can hear