Induction pipes
Discussion
Some years ago, I bought some short induction pipes and a mapped chip for my 4.5 and I've been very happy since.
Recently, while doing some fettling under the bonnet, and having removed said pipes, I have come to realise that the seating angle when they are attached is not right. Although they look firmly on from above, slipping a hand underneath at the engine end of the pipe shows that some of them do not seat properly on the flange. I don't know whether they leak or not, but there must be a good chance that they do - is that a major issue?
I'm assuming that since any leakage is upstream of the throttle butterflies it's probably not much of an issue?
Recently, while doing some fettling under the bonnet, and having removed said pipes, I have come to realise that the seating angle when they are attached is not right. Although they look firmly on from above, slipping a hand underneath at the engine end of the pipe shows that some of them do not seat properly on the flange. I don't know whether they leak or not, but there must be a good chance that they do - is that a major issue?
I'm assuming that since any leakage is upstream of the throttle butterflies it's probably not much of an issue?
The short induction pipes do not fit the standard backplates very well ,they do not seem to sit at the correct angle ,I experienced the same problem as you. I now have the carbon-fibre ACT backplates fitted to my airboxes along with the ACT short-induction pipes ,they are an excellent fit.
SimonKD said:
Short induction pipes fit perfectly on the ACT carbon fibre backplates. I think it's because the 4 outlets are at a better angle to accept the short induction pipes compared to the standard backplates.
Very useful to knowSadly the back-plates are not available to purchase separately - Oh well
ACT don't sell the short induction pipes separately, so your (various) points about the angle of the tubing makes a lot of sense. I was going to buy a new set of silicon pipes anyway, as mine have rubbed in various places...
...now I'm going to have to get the backing plates too!
"Dear Mr Bank Manger..."
By the way, am I right in thinking that the backplates are sealed with that black mastic that TVR use everywhere?
...now I'm going to have to get the backing plates too!
"Dear Mr Bank Manger..."
By the way, am I right in thinking that the backplates are sealed with that black mastic that TVR use everywhere?
Hi!
I went the short induction and chip route too....
I reinforced my induction by bonding Ali tube into the air boxes,
Never had an issue with sealing the induction pipes...and you can properly tighten the jubilee clips around the pipes as they have assurance from the aluminium.....
Now Al and Simon are going to shoot me down over air flow😜
Steve.G.
I went the short induction and chip route too....
I reinforced my induction by bonding Ali tube into the air boxes,
Never had an issue with sealing the induction pipes...and you can properly tighten the jubilee clips around the pipes as they have assurance from the aluminium.....
Now Al and Simon are going to shoot me down over air flow😜
Steve.G.
No Steve
Not at all.
I have nothing but admiration for how far you've managed to bring your Cerbera on since purchasing Her a few years back. This is with everything else "TVR Restoration wise" that's been happening too for as long as I've known you.
The only other differance is that the ACT backplates have carbon trompets to change the effective intake length. Just like on Mad Johns below. You can clearly see the 4 pipe connections are at a differant angle to standard ones.
Speak soon mate
SimonKD
Not at all.
I have nothing but admiration for how far you've managed to bring your Cerbera on since purchasing Her a few years back. This is with everything else "TVR Restoration wise" that's been happening too for as long as I've known you.
The only other differance is that the ACT backplates have carbon trompets to change the effective intake length. Just like on Mad Johns below. You can clearly see the 4 pipe connections are at a differant angle to standard ones.
Speak soon mate
SimonKD
The longer inlet length is likely to afford you more peak torque, but possibly at the expense of a drop in peak power (the torque hump occurs at lower revs). Arguably better on the street but not for racing.
I’m not an expert by any measure but I know I have to rag the s
t out of mine (with short induction) to get the best out of it 
Edit: ideally it should be rolling road mapped if you change the induction setup
I’m not an expert by any measure but I know I have to rag the s
t out of mine (with short induction) to get the best out of it Edit: ideally it should be rolling road mapped if you change the induction setup
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