Jenvey throttle bodies on Rover 4.8

Cobratone · Post by **Cobratone** » Fri Jul 31, 2009 9:03 am

Finally got round to taking some pictures of my new induction set-up: -

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topcatcustom · Post by **topcatcustom** » Fri Jul 31, 2009 9:27 am

Are they mounted on weber manifolds? They look like webers without the guts too! So any plans to put some filters on the tops or is the engine going to be like a big leaf sucker?!!!!

TC

unstable load · Post by **unstable load** » Fri Jul 31, 2009 10:19 am

Sweet setup!!

Wow, I would love to hear the induction roar from that motor.

ian.stewart · Post by **ian.stewart** » Fri Jul 31, 2009 12:31 pm

I WANT THOSE RAM PIPES!!!!!

Those manifolds look like TVR Racecar/JE ones to me, very similar to the ones I use,
I did away with the vacuum lines as mine were only goint to my fuel reg and as its not a rising rate system, they got deleted,
how did you get your coilpacks in there, it took a week of faffing about to get mine to fit, and they are still VERY tight in position,

spend · Post by **spend** » Sat Aug 01, 2009 1:21 am

ian.stewart wrote:I did away with the vacuum lines as mine were only goint to my fuel reg and as its not a rising rate system, they got deleted,

Don't they also act as balance pipes? Mine are all linked to a block which also houses vacuum takeoffs and the idle air valve.

Cobratone · Post by **Cobratone** » Sat Aug 01, 2009 5:18 am

topcatproduction wrote:Are they mounted on weber manifolds? They look like webers without the guts too! So any plans to put some filters on the tops or is the engine going to be like a big leaf sucker?!!!!

TC

They're mounted on JE manifolds, going to fit some filters but I need to modify my bonnet first to fit them in

Cobratone · Post by **Cobratone** » Sat Aug 01, 2009 5:20 am

ian.stewart wrote:I WANT THOSE RAM PIPES!!!!!
Those manifolds look like TVR Racecar/JE ones to me, very similar to the ones I use,
I did away with the vacuum lines as mine were only goint to my fuel reg and as its not a rising rate system, they got deleted,
how did you get your coilpacks in there, it took a week of faffing about to get mine to fit, and they are still VERY tight in position,

The coilpacks took ages to do because I fitted the manifolds first before I realised I could fit the coilpacks in there, then I found out that the vacuum lines were approx 2mm too low so ended up cutting the coilpacks and the plug leads down

Cobratone · Post by **Cobratone** » Sat Aug 01, 2009 5:21 am

spend wrote:
ian.stewart wrote:I did away with the vacuum lines as mine were only goint to my fuel reg and as its not a rising rate system, they got deleted,
Don't they also act as balance pipes? Mine are all linked to a block which also houses vacuum takeoffs and the idle air valve.

yes, I use the vacuum lines for my brake servo takeoff and for the MAP sensor on the megasquirt

glen · Post by **glen** » Sat Aug 01, 2009 1:37 pm

that looks great!! is there a manifold for a ford 302 that i could modify for 8 gsxr tb's, anyone?

mjheathcote · Post by **mjheathcote** » Tue Aug 04, 2009 10:01 pm

That looks great.
I'm using gsxr throttle bodies on my Triumph Stag V8 so quite similair.

What size connections are you using for the vacuum take off on each throttle body, and it looks like you have joined them all together in the same size nylon pipe? I ask because I am interested whether the size is suitable to provide sufficient vacuum for the brake servo.

Also are you using MAP sensor only or also throttle position as well? I understand that using MAP sensor on such arrangements with multiple throttle bodies does not work too well?

Thanks,
Mike

Cobratone · Post by **Cobratone** » Wed Aug 05, 2009 8:32 pm

mjheathcote wrote:That looks great.
I'm using gsxr throttle bodies on my Triumph Stag V8 so quite similair.

That sounds like fun, what are you doing about filters?

mjheathcote wrote:What size connections are you using for the vacuum take off on each throttle body, and it looks like you have joined them all together in the same size nylon pipe? I ask because I am interested whether the size is suitable to provide sufficient vacuum for the brake servo.

Not sure of the size, sorry but it's approx 6mm plastic hard pipe. They are all joined together into a vacuum canister, I use it for the brake take off and map sensor.

mjheathcote wrote:Also are you using MAP sensor only or also throttle position as well? I understand that using MAP sensor on such arrangements with multiple throttle bodies does not work too well?

Thanks,
Mike

I've tried tuning with both TPS and MAP based systems. Had good results from both but am probably sticking to MAP as I feel it gives me better control. There is poor vacuum at idle but it's good enough! Fortunately with the Megasquirt it's only a few keystrokes and I can change from TPS to MAP and back again if I want to

glen · Post by **glen** » Wed Aug 05, 2009 8:57 pm

mjheathcote wrote:That looks great.
I'm using gsxr throttle bodies on my Triumph Stag V8 so quite similair.

What size connections are you using for the vacuum take off on each throttle body, and it looks like you have joined them all together in the same size nylon pipe? I ask because I am interested whether the size is suitable to provide sufficient vacuum for the brake servo.

Also are you using MAP sensor only or also throttle position as well? I understand that using MAP sensor on such arrangements with multiple throttle bodies does not work too well?

Thanks,
Mike

can you post any pics of your manifold? i'm using gsxr tb's on my 302 as soon as i can get an inlet manifold fabricated. it was easy on a 4 pot, but i'm new to all this v8 stuff!

kokkolanpoika · Post by **kokkolanpoika** » Wed Aug 05, 2009 9:41 pm

what size are those bodies? and what kind of hp you estimate?

topcatcustom · Post by **topcatcustom** » Thu Aug 06, 2009 7:07 am

Is it an issue not tying the 2 sides of the vally together with a 1 piece manifold as Dimitri was trying to sort out a while ago? He had issues with the block cracking in the valley if I remember and was trying to sort out a brace of some kind..

Cobratone · Post by **Cobratone** » Thu Aug 06, 2009 10:47 am

glen wrote: can you post any pics of your manifold? i'm using gsxr tb's on my 302 as soon as i can get an inlet manifold fabricated. it was easy on a 4 pot, but i'm new to all this v8 stuff!

I have no pictures of the manifolds off the car but I'll try and take some of them on the car this afternoon.