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> Airflow/Horsepower limit for stock 2.0L intake system?
greggearhead
post Dec 12 2019, 11:32 AM
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OK, I did search, and couldn't really find anything.

My basic question - when does the 914 2.0L intake become a restriction to power?

I have a built VW 412 -

2056 cc Type 4
* 9550 RAT cam
* LE-180 heads (914 2L combustion chamber, 42mm intake, 36mm exhaust)
* Mallory Unilite vacuum advance distributor, Mallory Promaster coil, Mallory Hyfire CDI
* Stock 412 heater boxes & Thunderbird exhaust
* 2L Bus plenum and throttle body
* 2L 914 runners
* Ford "Design II" F1TE-D9A (Bosch 0280150947) 24# injectors (modified)
* SDS programmable EFI
* Oil bath air cleaner housing modified to use large circular filter element


I have a pair of IDF manifolds, and some VFR throttle bodies. Roughly equivalent to Weber 40IDFs (maybe a bit better in terms of flow). Engine made 115hp at the wheels. I'm just wondering if the (improved) stock intake is a cork or not?


(IMG:http://www.914world.com/bbs2/uploads_offsite/i61.photobucket.com-12836-1576171976.1.jpg)
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greggearhead   Airflow/Horsepower limit for stock 2.0L intake system?   Dec 12 2019, 11:32 AM
johnhora   Greg..please show us some pics of the 412....Thank...   Dec 12 2019, 12:54 PM
greggearhead   I don't have any current ones, really, but I...   Dec 12 2019, 01:01 PM
914sgofast2   Over on the Type 4 Forum I believe there was a dis...   Dec 12 2019, 01:04 PM
greggearhead   Yep, I think that's why he chose the component...   Dec 12 2019, 01:06 PM
GregAmy   "Subscribing". I'm looking to EFI my...   Dec 12 2019, 01:10 PM
greggearhead   https://shoptalkforums.com/viewtopic.php?t=143072   Dec 12 2019, 01:44 PM
GregAmy   https://shoptalkforums.com/viewtopic.php?t=143072...   Dec 12 2019, 04:26 PM
Mark Henry   If you had the room I'd make a plenum system b...   Dec 12 2019, 01:52 PM
greggearhead   That's a great idea, but this is a quick/no ti...   Dec 12 2019, 02:49 PM
rhodyguy   Are the IDF manifolds tall or short ones? Same sty...   Dec 12 2019, 03:13 PM
greggearhead   Absolutely nothing like a T3. At all. Tall man...   Dec 12 2019, 03:31 PM
Mark Henry   For the OP it's a tradeoff, the big limits for...   Dec 12 2019, 03:47 PM
Mark Henry   For the OP it's a tradeoff, the big limits fo...   Dec 13 2019, 10:00 AM
Mark Henry   Are you reading my posts? I run 46mm gxsr bike ...   Dec 13 2019, 11:41 AM
greggearhead   Are you reading my posts? I run 46mm gxsr bike...   Dec 13 2019, 12:01 PM
porschetub   Are you reading my posts? I run 46mm gxsr bike...   Dec 14 2019, 01:00 PM
greggearhead   Probably, but the setup on my car the PO put toget...   Dec 12 2019, 04:49 PM
Bleyseng   If you are in search of hp I’d switch to bigger ...   Dec 12 2019, 05:00 PM
greggearhead   I'm not really in search of *building* more po...   Dec 12 2019, 05:11 PM
Mark Henry   This is a 996 plenum. So for a 914 this is what I ...   Dec 13 2019, 07:34 AM
greggearhead   I've done lots of research and flow bench work...   Dec 13 2019, 09:21 AM
greggearhead   Can people still read the first post? I'm a...   Dec 13 2019, 09:22 AM
greggearhead   OMG - are you guys even reading my post? I alread...   Dec 13 2019, 10:12 AM
GregAmy   I asked about if anyone knew the limit of the fact...   Dec 13 2019, 10:52 AM
JamesM   OMG - are you guys even reading my post? I alrea...   Dec 15 2019, 04:41 PM
greggearhead   It's a 412! There is no engine hatch!   Dec 13 2019, 11:58 AM
Superhawk996   :WTF: :popcorn:   Dec 13 2019, 12:21 PM
GregAmy   I think we're done here. But while I have eve...   Dec 13 2019, 01:08 PM
Mark Henry   I think we're done here. But while I have ev...   Dec 13 2019, 01:47 PM
ChrisFoley   [url=http://www.sdsefi.com/air12.html]http://www....   Dec 14 2019, 11:13 AM
GregAmy   I thought the HP rules were for a 1.8L engine, in ...   Dec 15 2019, 10:20 AM
Bleyseng   OK, I did search, and couldn't really find an...   Dec 13 2019, 01:20 PM
Mark Henry   From what IIRC the 914 2.0L intake setup flows p...   Dec 13 2019, 01:46 PM
GregAmy   Nice...that's some clean work right there.   Dec 13 2019, 01:51 PM
TargaToy   That does look very doable, doesn’t it?   Dec 13 2019, 06:09 PM
Mikey914   From my experience the stock set up 2.0 will easil...   Dec 14 2019, 04:45 PM
Superhawk996   In so many ways this is why I got out of racing :...   Dec 15 2019, 01:13 PM
greggearhead   OK, just an update now that this thread has cooled...   Dec 11 2020, 04:08 PM
914werke   Was this car in WA? I recall a car that stopped in...   Dec 11 2020, 04:40 PM
greggearhead   Was this car in WA? I recall a car that stopped i...   Dec 11 2020, 07:57 PM
Beebo Kanelle   I think you will find that the intake runners are ...   Dec 11 2020, 06:19 PM
Dave_Darling   The general consensus seems to be that the exhaust...   Dec 13 2020, 12:56 AM
GregAmy   The general consensus seems to be that the exhaus...   Dec 13 2020, 10:14 AM
greggearhead   I wonder how the 412 heater boxes compare to the 9...   Dec 17 2020, 12:55 PM


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