Max air horn length for SV

[JohnCh]

Is anyone running Jenvey TBs on a Duratec in an SV without a hole in the bonnet?  If so, how long are the air horns in your setup and how deep is the filter? 

 

Given I'll be running a 620R nosecone, the intercooler ducting can be repurposed as a cold air feed for an under bonnet air filter, so I may opt to initially go that route and forgo cutting the bonnet until after I can compare air horn lengths on the dyno.  However, I have no idea what will actually fit, or if something appropriately sized is even available for the 50mm TBs (apparently options are limited for the bigger Jenveys.)

 

Thanks,

John

[Croc]

 

You may want to read this thread:

CSR/SV Duratec with airbox fully under the bonnet which TB? | Lotus Seven Club (lotus7.club)

 

 

Hans Per is a member on here but his ID escapes me right now.  

 

 

[JohnCh]

Thanks, I've been watching that thread, but no one is actually providing data except for the Caterham RB setup which is a lot shorter than the Jenveys.  I have more confidence in this group to actually answer the question  

 

-John

 

 

 

[ashyers]

John,

If you would like some measurements of the hole in my bonnet and trumpet relationship I'm happy to take them, but be warned, the motor mounts are not factory Caterham. My car is an early '03 Duratec and has some non standard parts.

 

Tell me what you'd like as a reference point and what you need for measurements.

 

Andy

[JohnCh]

Thanks Andy, I appreciate the offer, but given the differences it's may not be worth your effort.  I would still need to measure specific reference points on a new build to see how your engine placement differs so I could adjust the air filter backing plate to bonnet cut out measurements.  If I'm doing that, it's not much more effort to run string from scuttle to nosecone to mimic the bonnet location and take measurements from the head to the strings.  If no one else has any information, I may try that approach ( @Pokeywarning: there may be an incoming request to stop by your garage again with a tape measure).  If that is still inconclusive or proves too difficult given the location of the stock 420R intake, then I'll take you up on your kind offer and let you know which reference points are most helpful.

 

Thanks,

John