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Sweller341
Samba Member
Joined: October 23, 2018
Posts: 70
Location: UT
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 Posted: Wed Aug 21, 2019 4:03 pm Post subject: High comp with dtm shroud? |
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| Would the DTM fan shroud be worth if I wanted to run a higher compression ratio in a stock motor? |
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 76940
Location: Sneaking up behind you
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| Posted: Wed Aug 21, 2019 4:06 pm Post subject: Re: High comp with dtm shroud? |
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Bone stock.. heads, cam valves?
Why?
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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kadub
Samba Member
Joined: November 04, 2004
Posts: 444
Location: Auburn, Wa
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| Posted: Wed Aug 21, 2019 4:10 pm Post subject: Re: High comp with dtm shroud? |
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What is the goal here?
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Karl
aka Turbobaja |
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Sweller341
Samba Member
Joined: October 23, 2018
Posts: 70
Location: UT
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| Posted: Wed Aug 21, 2019 4:38 pm Post subject: Re: High comp with dtm shroud? |
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| Well stock displacement but whatever upgrades necessary to handle a higher CR. What upgrades would I need to do? Reason for stock displacement is because I like small displacement motors and I'm not hunting for high hp. Also I know that the higher the CR the more heat is produced and the DTM was designed for bigger motors, so would it cool better with the higher CR? |
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nextgen
Samba Member
Joined: August 19, 2004
Posts: 6032
Location: CONGERS, N.Y.
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Sweller341
Samba Member
Joined: October 23, 2018
Posts: 70
Location: UT
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Bama Dave
Samba Member
Joined: April 19, 2015
Posts: 963
Location: Alabama
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| Posted: Wed Aug 21, 2019 5:24 pm Post subject: Re: High comp with dtm shroud? |
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No longer available...
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1970 Beetle
1971 Super
1972 Baja
| hellthorne wrote: |
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buguy
Samba Member
Joined: November 17, 2003
Posts: 4915
Location: Port Orange, FL
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| Posted: Wed Aug 21, 2019 5:26 pm Post subject: Re: High comp with dtm shroud? |
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| I know a guy that is selling one. |
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busey
Samba Member
Joined: October 19, 2016
Posts: 420
Location: Sun City Arizona
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| Posted: Wed Aug 21, 2019 5:33 pm Post subject: Re: High comp with dtm shroud? |
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A "legendary shroud"?, according to the description in the ad. I don't know of anyone or have ever seen any of the the Big Boy California shops running the DTM shroud. It seems every other badass build (even turbo builds) is running the Bernie Bergmann Porsche style. Jus sayin
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jeffrey8164
Samba Member
Joined: January 06, 2018
Posts: 3819
Location: Georgia
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| Posted: Wed Aug 21, 2019 6:01 pm Post subject: Re: High comp with dtm shroud? |
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| Sweller341 wrote: |
| Would the DTM fan shroud be worth if I wanted to run a higher compression ratio in a stock motor? |
No, it would not be worth it.
A stock type 1 doghouse does a wonderful job.
I almost went with the Bergmann shroud but the only people that had positive things to say about it was the Bergmann site which is quite convincing by the way.
Since I plan on mostly cruising the mountains for 4-6 hours at a clip I stuck with proven stock cooling components.
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busey
Samba Member
Joined: October 19, 2016
Posts: 420
Location: Sun City Arizona
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| Posted: Wed Aug 21, 2019 6:13 pm Post subject: Re: High comp with dtm shroud? |
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| jeffrey8164 wrote: |
| Sweller341 wrote: |
| Would the DTM fan shroud be worth if I wanted to run a higher compression ratio in a stock motor? |
No, it would not be worth it.
A stock type 1 doghouse does a wonderful job.
I almost went with the Bergmann shroud but the only people that had positive things to say about it was the Bergmann site which is quite convincing by the way.
Since I plan on mostly cruising the mountains for 4-6 hours at a clip I stuck with proven stock cooling components. |
Years ago i saw an eye catching doublecab on the highway making a trek from Southern Cal to Central Cal and was shocked to see the inside of the engine compartment was sporting a Bernie Bergmann shroud. Ive asked that doublecabs owner who went by the name of "lizard" of Lizard Motorsports how his motor runs with that shroud and he has said, Just Fine! 
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Glenn
Mr. 010
Joined: December 25, 2001
Posts: 76940
Location: Sneaking up behind you
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| Posted: Wed Aug 21, 2019 6:39 pm Post subject: Re: High comp with dtm shroud? |
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Last Bermann engine I worked on was a 2332, the car was towed in. The #3 exhaust valve seat came out and jammed the valve open. On talking it apart, 2 other valve seats were loose. Also it was built with 311b rods that looked like they were clearanced on a bench grinder. The case was clearanced with an axe. The valve stems were stretched and the engine had signs of overheating.
The engine had 6000 miles and was a boat anchor.
We built a new long block for the customer but told him we would not reinstall the 911 shroud. He was also told if he installed there would be no warranty.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
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busey
Samba Member
Joined: October 19, 2016
Posts: 420
Location: Sun City Arizona
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| Posted: Wed Aug 21, 2019 6:46 pm Post subject: Re: High comp with dtm shroud? |
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| busey wrote: |
| jeffrey8164 wrote: |
| Sweller341 wrote: |
| Would the DTM fan shroud be worth if I wanted to run a higher compression ratio in a stock motor? |
No, it would not be worth it.
A stock type 1 doghouse does a wonderful job.
I almost went with the Bergmann shroud but the only people that had positive things to say about it was the Bergmann site which is quite convincing by the way.
Since I plan on mostly cruising the mountains for 4-6 hours at a clip I stuck with proven stock cooling components. |
Years ago i saw an eye catching doublecab on the highway making a trek from Southern Cal to Central Cal and was shocked to see the inside of the engine compartment was sporting a Bernie Bergmann shroud. Ive asked that doublecabs owner who went by the name of "lizard" of Lizard Motorsports how his motor runs with that shroud and he has said, Just Fine! |
Believe it or not, that doublecab is the one i saw hauling ass equipped with a Bernie Bergmann. How those Cali boys have been doing it, who knows, but they always seem to be several steps ahead of the rest of the field. 
[/quote]
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slalombuggy
Samba Member
Joined: July 17, 2010
Posts: 9147
Location: Canada
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| Posted: Wed Aug 21, 2019 7:15 pm Post subject: Re: High comp with dtm shroud? |
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Pat Downs said I'd be fine running my Bergmann fan on my new FI turbo 2332. He's built a lot of engines using them. FAT also uses them a lot.
To the OP, your factory shroud will be more than adequate for your needs. It will keep much larger engines with high compression cool. Higher compression doesn't nessasarily translate into higher engine temps.
brad |
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bugguy1967
Samba Member
Joined: January 16, 2008
Posts: 4343
Location: Los Angeles, CA 90016
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| Posted: Wed Aug 21, 2019 7:51 pm Post subject: Re: High comp with dtm shroud? |
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Just run a factory or 36hp shroud. More compression might not even raise temps if the compression is adequate for the valve events. Are you using another cam than stock?
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Sweller341
Samba Member
Joined: October 23, 2018
Posts: 70
Location: UT
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| Posted: Wed Aug 21, 2019 8:04 pm Post subject: Re: High comp with dtm shroud? |
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| bugguy1967 wrote: |
| Just run a factory or 36hp shroud. More compression might not even raise temps if the compression is adequate for the valve events. Are you using another cam than stock? |
no |
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nextgen
Samba Member
Joined: August 19, 2004
Posts: 6032
Location: CONGERS, N.Y.
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| Posted: Wed Aug 21, 2019 8:06 pm Post subject: Re: High comp with dtm shroud? |
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Hey week ago it was not available at the Type IV store. Just went back and it is back -- $625 8 -12 weeks.
To be honest the DTM is an amazing fan housing, it gets all 4 cylinders equal cooling -and the oil cooler- that said it and the Bernie stuff do not have Thermostats or vanes. But for warm weather guys, OK .. Or High Performance.
Cold climate like NY, you may never get running temp.
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[email protected]
Samba Member
Joined: May 17, 2003
Posts: 4863
Location: Harmony, PA
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SGKent
Samba Member
Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
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| Posted: Wed Aug 21, 2019 9:22 pm Post subject: Re: High comp with dtm shroud? |
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8:1 on a 1600 won't kill it. Burn premium. I ran quite a few bus 1600 DP motors at 8:1 with no issues, stock DP doghouse shroud. I'd run 8:1 on my 2L T4 but 2L t4 already overheat, and I have to smog test so the NOX might go up quite a bit.
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bugguy1967
Samba Member
Joined: January 16, 2008
Posts: 4343
Location: Los Angeles, CA 90016
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| Posted: Wed Aug 21, 2019 9:33 pm Post subject: Re: High comp with dtm shroud? |
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Yeah, what's high compression to you? 1. You can't run a stock carburetor with the DTM, so you'll need duals. 2. If you run dual 2-barrels, like 36 IDFs, you can safely run about 8.25:1 on 91 octane.
I installed a DTM shroud on a Type 1 that I built, and it was an absolute nightmare. It took about ten hours to do all the necessary mods to make it fit. There were huge issues. Go through my gallery and you'll see that I needed to mill off 3/8"-1/2" from my alternator stand to get the shroud low enough to bolt onto my heads.
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