 Type IV Engine - Some assembly Required |
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| Jake Raby |
 Dec 20 2005, 09:28 AM
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#21
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Engine Surgeon  Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States  |
I haven't used a stcok cam in about 10 years.... Its the most horrible part of the engine's design! Your carbs will be loud as hell and the car just won't move with the stock cam in the combination with carbs, in fact you'll have more power at part throttle than at wide open with the stock cam!
And your heads will run 40 degrees hotter than they need to... The stock cam is horrible in every aspect. |
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| adammtb |
Dec 20 2005, 01:55 PM
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#22
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Member Group: Members Posts: 68 Joined: 24-September 05 From: Asheville, NC Member No.: 4,856 |
What would you suggest for a camshaft setup? Given it's originally a 1.7 with 1.8 pistons and cylinders. And we're running 34 ICTs.
I guess I just assumed it was the stock Cam, I don't know how to tell. But it does have some numbers on it. 021.109.111B VW(symbol) 16H Starting at the gear end, and taking the first lobe to be 12 oclock, the next lobes are at about 8, 5, and then 9 o'clock. There is also a -2 stamped near the teeth of the gear at about 4:30. |
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| Jake Raby |
Dec 20 2005, 02:55 PM
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#23
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
RAT 9530
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| adammtb |
Dec 20 2005, 03:09 PM
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#24
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Member Group: Members Posts: 68 Joined: 24-September 05 From: Asheville, NC Member No.: 4,856 |
and we'd have to upgrade the rocker springs? and what else?
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| Cap'n Krusty |
Dec 20 2005, 05:12 PM
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#25
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
They don't have the largest valves. You'll also need to calculate the deck height and combustion chamber because the compression ratio's gonna be higher. |
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| Jake Raby |
Dec 20 2005, 05:32 PM
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#26
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
You need;
a spring upgrade Retainer upgrade rocker arm upgrade (so you can use 911 adjusters) 911 adjusters pushrod update This is to make the assembly capable of attaining proper rocker geometry as well as something that has parts up to twice as stromng as stock. Keep in mind that the ONLY thing the really ever kills a TIV is valve train failures.... |
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| adammtb |
Dec 20 2005, 11:35 PM
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#27
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Member Group: Members Posts: 68 Joined: 24-September 05 From: Asheville, NC Member No.: 4,856 |
Thanks to everyone for the input on the cams. Although it's a hard pill to swallow we're just not going to be able to do that this time around. Maybe in the spring.
We have, however, run into a bit of a problem. We were checking the oil relief valve, and it appears to be stuck. It's the one one the underside, near the front, of the right half of the case. We took the monster nut off and the spring came out but we can't get the plunger to slide out. (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif) Are we totally hosed? Or is there some kind of fix? (IMG:http://www.914world.com/bbs2/html/emoticons/blink.gif) |
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| Elliot_Cannon |
Dec 20 2005, 11:43 PM
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#28
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Senior Member Group: Retired Members Posts: 1,922 Joined: 26-March 03 From: Orange County Ca Member No.: 480 Region Association: None |
I believe MattR had the same problem with his engine but I don't remember how he resolved the problem. Matt??
Elliot |
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| bd1308 |
Dec 20 2005, 11:54 PM
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#29
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
cant you get one of those magnetic things like the lifters are pulled out with?
b |
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| Aaron Cox |
Dec 20 2005, 11:55 PM
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#30
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
he got a new case IIRC (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) i also had the same problem. i used a NEODMIUM magnet (UBER strong... and it pulled it out...) AA |
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| adammtb |
Dec 20 2005, 11:59 PM
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#31
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Member Group: Members Posts: 68 Joined: 24-September 05 From: Asheville, NC Member No.: 4,856 |
then did you get a new one? or bore out the hole more? or was it enough to just unstick it? |
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| Aaron Cox |
Dec 21 2005, 12:04 AM
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#32
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
mine was "crud stuck".... no bore damage or anything. just crud holding it in.... AA |
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| craig downs |
Dec 21 2005, 01:28 AM
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#33
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Senior Member Group: Members Posts: 768 Joined: 25-November 05 From: mira loma ca. Member No.: 5,189 Region Association: Southern California |
Thanks Jake you learn something everyday. I put on dual carbs. with a stock cam and could not understand why it made all its power with the carbs. barely open. I put in smaller venturies and that
helped a little bit but it was never really good. They were also loud even barely open kinda annoying. By the way I am new born here and this my first post. I have learnd so much in such a short time here. I have a 75 914 that I have had since 77 and the second owner. It is going thru a resto right now hope to get her finished in about a year. I'm planing to put in one of Jake 2270s Thanks to all Craig |
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| adammtb |
Dec 21 2005, 11:11 AM
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#34
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Member Group: Members Posts: 68 Joined: 24-September 05 From: Asheville, NC Member No.: 4,856 |
So we were down at our local VW engine shop (Peak Performance, near D.C) looking for some random parts and it turns out they had some cams in stock. Actually we were trying to finish to bottom end last night but we didn't have any vibration dampeners.
Anyway, we got a new cam and some new lifters too. It's a Scat C25; Just a touch more aggressive than stock but mild enough not to warrant a new top end. We feel much better about the build now, (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) although the pocketbook has been totally obliterated. (IMG:http://memimage.cardomain.net/member_images/7/web/2203000-2203999/2203053_14_full.jpg) As far as the sticky oil valve: the guys at the shop said we could probably use a tap to grip inside the plunger and twist it free and pull it out. So we picked up some taps and we'll see how that goes. |
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| ewdysar |
Dec 21 2005, 11:37 AM
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#35
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What happens here, stays here. Group: Members Posts: 558 Joined: 29-October 04 From: Altadena, CA Member No.: 3,030 |
Looks like you're at least getting the beer shortage handled. (IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif)
Good luck with the rebuild, given your time and $$ constraints, it should work out well enough. Hopefully, by the next time you head into the engine, you'll have had the opportunity to learn more of what you want, and have more time to prepare your wallet. 914's may be the "cheap" Porsche, but they're still Porsche's... Welcome to the club. Eric |
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| Jake Raby |
Dec 21 2005, 01:41 PM
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#36
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Oh no.....
Thats all I have to say. |
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| type47 |
Dec 21 2005, 02:29 PM
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#37
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
now jake (and everybody else), sometimes we have to just step back and let people go their own way, kinda like children, we may have to let them learn by their mistakes. |
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| adammtb |
Dec 21 2005, 06:19 PM
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#38
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Member Group: Members Posts: 68 Joined: 24-September 05 From: Asheville, NC Member No.: 4,856 |
Did we blow it on the cam thing?
As far as the stuck oil valve. The tap worked well. a 12mm was too small, but a 1/2-20 did the trick. It threaded in some and then we were able to wiggle the plunger out. We tried lightly sanding the plunger to get it so slide smooth but the inside of the case seems like the rough part. So we may have to hone it a little (somehow) (IMG:http://memimage.cardomain.net/member_images/7/web/2203000-2203999/2203053_15_full.jpg) |
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| mike373 |
Dec 21 2005, 06:33 PM
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#39
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Member Group: Members Posts: 198 Joined: 3-August 05 From: san diego, ca Member No.: 4,536 |
What about all the metal shavings from drilling?? You dont want any of that in the case...and it looks like you already joined the case halves..... Or did you?
Mike |
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| degreeoff |
Dec 21 2005, 06:49 PM
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#40
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I like big butts and I can not lie! Group: Members Posts: 1,622 Joined: 9-February 03 From: Booowieeee MD (near DC) Member No.: 275 Region Association: MidAtlantic Region |
Man you guys are breakin my heart....Josh here. I have a Scat c-25 with 2k miles just sitting here with the lifters I'd let that go for 100 bucks.....We Really SHOULD have met up
Oh well Josh |
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