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Author Topic: valve train  (Read 4613 times)

July 28, 2009, 09:20:01 am

smoken u

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valve train
« on: July 28, 2009, 09:20:01 am »
just wondering on m,y current build im looking to sp[in around 6000 to 7000 rpm is the stock vavletrain able to handle this rpm??
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1990 VW jetta 1.6 td, 2.5" exhaust, no muffler, governor mod 2010 edition, K&N filter. and now 66 hp and 136 ftlbs.
project 1.6 liter in the works  :)
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You don't rev a VW diesel, you increase the clatter.
Reply #1July 28, 2009, 09:23:12 am

Rabbit on Roids

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Re: valve train
« Reply #1 on: July 28, 2009, 09:23:12 am »
oh hell yea, you ever looked at it? its got tough dual spring setups from the factory tho. but uh, good luck spinnin it 7k.
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Reply #2July 28, 2009, 09:36:15 am

smoken u

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Re: valve train
« Reply #2 on: July 28, 2009, 09:36:15 am »
lol im gonna try my hardest to. I was looking at the dual valve sprinfgs but just wanted to make sure, just becasue i ususally work on cummmins, and you have to upgrade vavle springs on them just to get 4000 rpm outta them.  ::)
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1990 VW jetta 1.6 td, 2.5" exhaust, no muffler, governor mod 2010 edition, K&N filter. and now 66 hp and 136 ftlbs.
project 1.6 liter in the works  :)
-------------------------------------------------------
You don't rev a VW diesel, you increase the clatter.
Reply #3July 28, 2009, 09:42:44 am

Black Smokin' Diesel

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Re: valve train
« Reply #3 on: July 28, 2009, 09:42:44 am »
The valvetrain and crankshaft will take 7000 rpm easy but the fuel pump will start to skip above 6000 rpm.
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Reply #4July 28, 2009, 11:33:57 am

smoken u

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Re: valve train
« Reply #4 on: July 28, 2009, 11:33:57 am »
now is that skip just caused by lack of fuel or spinning too fast for the weights inside of it??
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1990 VW jetta 1.6 td, 2.5" exhaust, no muffler, governor mod 2010 edition, K&N filter. and now 66 hp and 136 ftlbs.
project 1.6 liter in the works  :)
-------------------------------------------------------
You don't rev a VW diesel, you increase the clatter.
Reply #5July 28, 2009, 12:09:22 pm

burn_your_money

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Re: valve train
« Reply #5 on: July 28, 2009, 12:09:22 pm »
Spinning too fast for the plunger to return to the bottom of it's stroke
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Tyler
Reply #6July 28, 2009, 12:17:44 pm

smoken u

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Re: valve train
« Reply #6 on: July 28, 2009, 12:17:44 pm »
interesting, is there anyway this problem could be overcome at all??
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1990 VW jetta 1.6 td, 2.5" exhaust, no muffler, governor mod 2010 edition, K&N filter. and now 66 hp and 136 ftlbs.
project 1.6 liter in the works  :)
-------------------------------------------------------
You don't rev a VW diesel, you increase the clatter.
Reply #7July 28, 2009, 04:44:26 pm

8v-of-fury

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Re: valve train
« Reply #7 on: July 28, 2009, 04:44:26 pm »
Don't spin it over 6000 rpm  ;)

There will be virtually zero usable Torque or Power above that anyhow. 6000 is faster then you will ever need it to spin  ;D

Why do you wish to spin to 7k?

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Reply #8July 28, 2009, 06:43:39 pm

smoken u

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Re: valve train
« Reply #8 on: July 28, 2009, 06:43:39 pm »
well i really have no particular reason to spin 7000 rpm, yeah it would be interesting to do so adn one hell of an adventure especially to try to engineer the pump to do so, nothing wrong with tyring to achieve somthing, but think for a moment in the real world, what if you miss a shift, and go say from 5th to second you would see an increase of revs far past what what you could fuel. not saying that i miss shifts, but it does and can happen to the best of us.
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1990 VW jetta 1.6 td, 2.5" exhaust, no muffler, governor mod 2010 edition, K&N filter. and now 66 hp and 136 ftlbs.
project 1.6 liter in the works  :)
-------------------------------------------------------
You don't rev a VW diesel, you increase the clatter.
Reply #9July 28, 2009, 06:52:30 pm

8v-of-fury

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Re: valve train
« Reply #9 on: July 28, 2009, 06:52:30 pm »
Quote from: smoken u on July 28, 2009, 06:43:39 pm
well i really have no particular reason to spin 7000 rpm, yeah it would be interesting to do so adn one hell of an adventure especially to try to engineer the pump to do so, nothing wrong with tyring to achieve somthing, but think for a moment in the real world, what if you miss a shift, and go say from 5th to second you would see an increase of revs far past what what you could fuel. not saying that i miss shifts, but it does and can happen to the best of us.

Hey man if you could engineer it to work it would be bad ass! Do you dump the clutch whilst down shifting? a miss from 5th to 2nd would probably detonate something ?? maybe. Can you make it work to 7k? it would be awesome if you could make it actually make power up there too. but i think then you not only run in to problems with fueling.. but you can't get enough air in.. and out :P those heads were never designed to flow that much LOL
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Reply #10July 28, 2009, 07:02:21 pm

theman53

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Re: valve train
« Reply #10 on: July 28, 2009, 07:02:21 pm »
I don't know. The guy named AKI is building one to do just that. Right around 7,000 RPM. The ideas that come from that guy are amazing and I bet he will have it going soon.
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Reply #11July 28, 2009, 07:15:43 pm

8v-of-fury

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Re: valve train
« Reply #11 on: July 28, 2009, 07:15:43 pm »
AKI is insane.. I have read many of his threads. Pure Genius that guy
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Reply #12July 28, 2009, 08:04:58 pm

RabbitJockey

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Re: valve train
« Reply #12 on: July 28, 2009, 08:04:58 pm »
i wonder if an inline pump would do the trick, but i guess they could be worse
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Reply #13July 28, 2009, 08:06:02 pm

RabbitJockey

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Re: valve train
« Reply #13 on: July 28, 2009, 08:06:02 pm »
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01 Jetta TDI 100% stock daily
81 Rabbit:TDI-M ported head, Frank06 cam, PD intake, hybrid T3 turbo, Renault intercooler, Syl20 11mm pump, light weight fw, and yellow California Clutch clutch kit
Reply #14July 29, 2009, 08:12:07 am

smoken u

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Re: valve train
« Reply #14 on: July 29, 2009, 08:12:07 am »
thats a fancy looking pump almost like a bosch p series fopund on cummins 4bt's
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1990 VW jetta 1.6 td, 2.5" exhaust, no muffler, governor mod 2010 edition, K&N filter. and now 66 hp and 136 ftlbs.
project 1.6 liter in the works  :)
-------------------------------------------------------
You don't rev a VW diesel, you increase the clatter.
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