TWN or JENVEY injection systems ( Anybody have any experience with them?)

[herman maire]

Just wondering...I have a long block 95 993 motor and instead of just buying the stock intake is a single throttle body set up much better???

Jenvey cost $2500-3000
I still have not checked for the what the TWM set up cost.
Are there any others that are cheaper?

Are they worth it?? How reliable are they?

This would be for a street track/street car.

Also what can a 993 motor with hydrolic valves safely rev too.
Is it worth swaping in a 964 valve train if I plan to rev to 7200-7500 RPM.

[Jeff Alton]

Mike B is running the TWM stuff and I know that Jwerion is running the Jenveys. I am ordering my Jenvey's this week. Many others are using them as well.

Cheers

[herman maire]

Originally posted by catca
Mike B is running the TWM stuff and I know that Jwerion is running the Jenveys. I am ordering my Jenvey's this week. Many others are using them as well.

Cheers

Great I would love to hear what they think of them.

I was initialy thinking of going in the direction of a turbo set up but there is somthing that is more appealing about a tuned light weight N/A motor in my 72 RSR.

I wonder if we got a GROUP BUY together if the price would change much.

Just wondering what made you go for the Jenvey's VS the TWM's also what are you getting them for??. I still have to call TWM .

Are you getting them from the U.S or the canadian disrtibuter in BC??

Thanks Catca
PS- Are you still looking for a 3.6?

[Jeff Alton]

PM or email me about where I am getting them.......

The Jenvey is a far superior product from everything I have been told. I have never actually seen a TWM but have seen the Jenvey stuff and it is really, really nice stuff!! The price difference I think is pretty minor.

Cheers

[Mike Bonkalski]

I have the TWM 3003 series throttles which use the basic Weber architecture and they are nice, but pale in comparison to the Jenvey throttles. The Jenvey's castings, fit and finish are superior to the 3003 series throttles. They also have more options in terms of body and manifold sizing when compared to the 3003 series TWM's. They are basically on par with the 3006 series TWM's, but at a lower price point.

If you are starting with a long block the price difference between the 3003 series and the Jenvey's is basically a wash and you might as well go with the higher quality product. I went with the 3003 series because I already had Webers and didn't need to purchase manifolds, linkage, air filters, etc...

[Porschekid962]

The Jenvey's are pretty neat in that you can piece together a pretty custom kit. I dont have much knowledge of the TWM but from their site the product looks good, they just dont have much info. Also the throttle linkage system and syncing all the bodies to one another was incredibly simple, straightforward and took about 5-10 minutes once the bodies were assembled to the manifolds and air horns. Jenvey also has multiple injector locations, air horns with injectors, TWM has the high mount injector kit but thats really only for racing and it appears to be a dual injector setup as well.

I think if you tested the two side by side on identical or the same motor the results were be damn near identical if you used the same bore and length for each.

I ended up choosing taper bore 48mm throttle bodies which taper down to 41mm at the base of the manifold. The trumpets are 90mm long and are gorgeous. Everything fit together easily, instructions were not there for assembly but thats rather self explanatory. There is a full description of how to attach and then wire the TPS sensor, balance the throttles, assembly the linkage system, setup the fuel system and so on. The stuff was wrapped extremely well I might add.

I really dont think you can go wrong either way though, Jenvey just has some great prices on replacements and air horns and other bits. My kit came with

manifolds
throttle bodies
air horns
fuel rails
TPS
filter baseplates (I opted for ITG filters over the Jenveys)
linkage
crossbar linkage
plenty of hardware, i have extra
instructions
2 stickers

[herman maire]

Originally posted by Porschekid962
The Jenvey's are pretty neat in that you can piece together a pretty custom kit. I dont have much knowledge of the TWM but from their site the product looks good, they just dont have much info. Also the throttle linkage system and syncing all the bodies to one another was incredibly simple, straightforward and took about 5-10 minutes once the bodies were assembled to the manifolds and air horns. Jenvey also has multiple injector locations, air horns with injectors, TWM has the high mount injector kit but thats really only for racing and it appears to be a dual injector setup as well.

I think if you tested the two side by side on identical or the same motor the results were be damn near identical if you used the same bore and length for each.

I ended up choosing taper bore 48mm throttle bodies which taper down to 41mm at the base of the manifold. The trumpets are 90mm long and are gorgeous. Everything fit together easily, instructions were not there for assembly but thats rather self explanatory. There is a full description of how to attach and then wire the TPS sensor, balance the throttles, assembly the linkage system, setup the fuel system and so on. The stuff was wrapped extremely well I might add.

I really dont think you can go wrong either way though, Jenvey just has some great prices on replacements and air horns and other bits. My kit came with

manifolds
throttle bodies
air horns
fuel rails
TPS
filter baseplates (I opted for ITG filters over the Jenveys)
linkage
crossbar linkage
plenty of hardware, i have extra
instructions
2 stickers

Thanks for taking the time to write that up.

One of my concerns is how much better a jenvey/twm set up VS a tuned
95 , 993 motronic or maybe a VARIORAM set up?

I really do not have any experience with STB set ups and what they contribute.

I know a motronic set up with a really light flywheel/ cams is pretty impressive .
I just dont know right now if the extra $$$$ is really worth it for a STB set up right now. The cool factor is huge though.

[Lukesportsman]

How radical do you think you'll go with the cams? Radical cam, change in compression, change in exhaust all are going to look favorable on a stand alone fuel/spark management. Now saying that, you'll also spend more time and money.

ITB's will give you the right sound for a "RS" and throttle response similar to MFI if tuned well. It will look right and just be cool. A single throttle body OEM will just look and sound like an engine conversion.

I went Jenvey's and MS II.

[Dennis Kalma]

Is there any issue with either the Jenvey's or the TWM's with regard to fitting an air conditioning compressor?

Dennis

[Mike Bonkalski]

Yes, there are some issues associated with the fitment of ITB's and AC. A lot depends on the height of the manifolds, type of compressor and the orientation of the lines.