 Will 2.4 L engine work with stock FI, Will stock FI work with a larger bore engine |
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| reharvey |
 Jan 13 2011, 10:25 AM
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Senior Member  Group: Members Posts: 573 Joined: 16-July 08 From: N. E. Ohio Member No.: 9,308 Region Association: North East States  |
I'm getting ready to build a 2.0 engine for my latest 914 project. I've put together several of these motors in the past but have always used the Euro type Mahle 94mm pistons. How big of a piston can I use and still retain the FI. I can make minor modification to the FI if need be. I've done this in the past. Has anyone out there try this?
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| r_towle |
Jan 13 2011, 02:29 PM
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Custom Member Group: Members Posts: 24,588 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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You cant change the type of manifold pressure (short stroke and stock overlap) but you can change the volume.
You will need a way to tune your mps when you are ready. Rich |
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| reharvey |
Jan 13 2011, 02:47 PM
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Senior Member Group: Members Posts: 573 Joined: 16-July 08 From: N. E. Ohio Member No.: 9,308 Region Association: North East States |
QUOTE(r_towle @ Jan 13 2011, 03:29 PM)  You cant change the type of manifold pressure (short stroke and stock overlap) but you can change the volume. You will need a way to tune your mps when you are ready. Rich I've tuned the MPS on several of my other cars so that's not a problem. Just hoping that the end result will give more go power without any major glitchs with the FI. Some people would just put on carbs but I've kept the FI on all of my 914s because it works so well. |
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| r_towle |
Jan 13 2011, 03:01 PM
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#4
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Custom Member Group: Members Posts: 24,588 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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QUOTE(reharvey @ Jan 13 2011, 03:47 PM) QUOTE(r_towle @ Jan 13 2011, 03:29 PM) You cant change the type of manifold pressure (short stroke and stock overlap) but you can change the volume. You will need a way to tune your mps when you are ready. Rich I've tuned the MPS on several of my other cars so that's not a problem. Just hoping that the end result will give more go power without any major glitchs with the FI. Some people would just put on carbs but I've kept the FI on all of my 914s because it works so well. 150-165 hp is the max D-jet really....and that would be with a 9.5:1 CR.... If you do that, its gonna get hot, so plan for the heat. Manfold pressure is how drag racers use fuel injection, so there really is not an upper limit....but with our Djet you are dealing with fixed air/fuel maps that are hard coded. You can use aftemarket FI and get alot better results, but you can also restrict the build to use Djet and that can be fun. Same cam is the key. And that really sucks, but thems is the facts. Same stroke is the key. This leaves alot on the table for potential HP. but its still a fun car to drive Get a header also... Rich |
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Posts in this topic
reharvey Will 2.4 L engine work with stock FI Jan 13 2011, 10:25 AM
realred914
I'm getting ready to build a 2.0 engine for m... Jan 13 2011, 10:28 AM orange914 NOOOOOOOOOO Jan 13 2011, 11:09 AM orange914 oh :wttc:
2056 with MPS modification is about th... Jan 13 2011, 11:11 AM ChrisNPDrider Maybe Andy will chime in. He has a very nice red 9... Jan 13 2011, 11:19 AM
reharvey
Maybe Andy will chime in. He has a very nice red ... Jan 13 2011, 01:31 PM r_towle Yes it works.
Keep the stroke the same, 71mm and p... Jan 13 2011, 02:05 PM reharvey
Yes it works.
Keep the stroke the same, 71mm and ... Jan 13 2011, 02:13 PM Vacca Rabite since you are increasing displacement by nearly 1/... Jan 13 2011, 02:17 PM reharvey
since you are increasing displacement by nearly 1... Jan 13 2011, 02:21 PM reharvey
[quote name='reharvey' post='1417425' date='Jan 1... Jan 13 2011, 03:21 PM johannes Then Jake Raby will come in and tell you 2056 is t... Jan 13 2011, 02:52 PM Brett W Why would you handicap the motor? I realize it is... Jan 13 2011, 03:27 PM Jake Raby There are really no limits in engine maniplation. ... Jan 13 2011, 05:51 PM r_towle
There are really no limits in engine maniplation.... Jan 14 2011, 02:56 PM realred914
There are really no limits in engine maniplation... Jan 15 2011, 12:06 PM Krieger My engine is a 78 x 96 with a mild webcam for FI e... Jan 13 2011, 07:54 PM reharvey
My engine is a 78 x 96 with a mild webcam for FI ... Jan 14 2011, 11:04 AM ChrisNPDrider Of course Andy built it himself! :headbang:
... Jan 14 2011, 02:54 PM Jake Raby I'd be willing to bet that a 2.4 designed arou... Jan 14 2011, 07:42 PM Bleyseng
I'd be willing to bet that a 2.4 designed aro... Jan 15 2011, 11:14 AM Krieger The biggest compromise for some is money! Jan 14 2011, 08:03 PM Jake Raby
The biggest compromise for some is money!
W... Jan 14 2011, 08:16 PM Krieger Hey Mr. Self Righteous, your way is not the only w... Jan 14 2011, 10:32 PM Valy What about using the L-Jet?
Is it better for big e... Jan 15 2011, 01:40 AM Jake Raby
Hey Mr. Self Righteous, your way is not the only ... Jan 15 2011, 08:19 AM 76-914
Hey Mr. Self Righteous, your way is not the only... Jan 15 2011, 10:09 AM Bleyseng Certain early longsnout MPS's have more range ... Jan 16 2011, 04:43 AM Bleyseng Certain early longsnout MPS's have more range ... Jan 16 2011, 04:44 AM |
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