The rear bumper was a simple bolt-on swap. I didn’t get all the necessary brackets for the front, so I had to fabricate a couple parts. The ...   01-25-2021 09:16 pm

Tim, Fuel induction & ignition are mostly unrestricted in Street Prepared, so EFI is probably the single most significant engine upgrade I can make within the ...   04-28-2017 12:53 pm

It's been quite a while since I updated this thread. Unfortunately, the J-H's season was cut short last year, due to one of those ...   04-28-2017 01:36 am

Esprit2 wrote: Steve, Nice looking diff, but... have you ever autocrossed a lightweight car with a limited slip differential? 1) Limited slip under power will tend ...   02-07-2016 12:40 pm

I received a box from Gripper today. Inside was a shiny new limited slip unit for the J-H! I understand all five units ...   02-01-2016 06:55 pm

KICHR wrote: The other unit mentioned by Steve is going into my JH which already runs an engine by Lotusbits. Cost point right now seems to settle ...   12-21-2015 03:37 pm

Good news! I just received word from John at Gripper, indicating a limited slip design has been completed, and production of 5 units is ...   12-21-2015 11:50 am

Spending a little time on interior modifications this weekend. First, those floor mats were the easiest 11 lb weight reduction ever. Would never have guessed ...   12-12-2015 09:52 pm

Jim Picot wrote: ...I wouldn't have thought you could remove the spring retainers without causing problems - they locate the springs on the lower arms and ...   12-02-2015 11:23 pm

Pretty easy to get the Autopower bars in the U.S., but I assume shipping would be prohibitive to the UK. http://www.autopowerindustries.com/Roll-Bars-Cages/Jensen-Jensen_-_Healey-1972-1976 It might be cheaper to have ...   12-02-2015 06:54 pm

Brett Gibson JH5 20497 wrote: I'm not quite getting what you are trying to describe, I do have a few photo's of the rear springs in ...   12-02-2015 04:56 pm

This seems like a good thread to ask a question I have about the rear spring assemblies. I'm planning to convert from the stock ...   12-02-2015 01:29 pm

Brett Gibson JH5 20497 wrote: I have the Haynes book and it has a lot of good info in it, make speak for the others. I ...   12-02-2015 01:17 pm

Question - which Vauxhall Viva HB manual would you recommend? There are a number of options available cheaply through Amazon. I'm reluctant to order the ...   12-02-2015 11:43 am

More helpful info - thanks Tim! Here are a few more details on the Lotusbits EFI system. It uses Jenvey throttle bodies, typically 45mm for ...   11-29-2015 02:56 pm

Esprit2 wrote: ...The early JH Mk I 907 did have the small ports, however, the later Mk II did get larger ports... the ones I believe ...   11-27-2015 11:19 pm

Esprit2 wrote: Steve, The very early 907 Mk I intake ports were 24.5 mm tall. Later, they were increased to 25.5 mm as a running ...   11-26-2015 11:26 pm

So, I've read through pages of old threads on past efforts to come up with a limited slip unit for the standard J-H rear axle. ...   11-26-2015 09:25 pm

Stopped by Lotusbits for an extended visit this afternoon. Located in a rural area just Southeast of Coventry, the shop is an absolute treasure trove ...   11-26-2015 09:08 pm

Thanks again Tim! This thread is quickly becoming a valuable repository of build data. I'll see what kind of price tag Mike puts on the ...   11-18-2015 07:57 pm

Thanks. Note - I just heard back from Mike @ Lotusbits. No vernier pullies for the older square tooth belts, but he has ...   11-18-2015 03:52 pm

Tim, This is VERY helpful information! My J-H is a later '74 JH5, so I'm assuming it came with the larger port head. ...   11-18-2015 03:28 pm

Thanks for the info! Interesting you should mention Lotusbits. I'm visiting their shop when I'm in the UK next week. I may have to ...   11-17-2015 04:15 am

Does anyone have experience with the intake manifold offered by Pierce Manifolds for Weber/Dellorto carbs? http://dkmac.okzks.servertrust.com/product_p/99003.907.html It appears to be very similar to the European Dellorto manifold, ...   11-13-2015 10:52 am

subwoofer wrote: Are you allowed to touch the head? Just cleaning up the bowls of the ports and radius grinding the seats should make the head ...   11-09-2015 12:48 pm

Tim Murphy wrote: In the interest of safety I want to point out Ron Earl's post about a failure of his drive shaft or U joints ...   11-09-2015 11:20 am

subwoofer wrote: Would you be allowed to replace the bumpers with the early type? Should save a quite few tens of pounds right there, the rubber ...   11-09-2015 11:11 am

Tim Murphy wrote: I don't know the rules, but those large, molded, rubber front floor mats are heavy. Replacing those with some carpet mats purchased at ...   11-09-2015 02:46 am

Tim Murphy wrote: Steve, thanks for the reply. You obviously have a lot of experience building race cars and I none. I was just sharing thoughts ...   11-08-2015 11:15 am

Note - I typically keep pretty close tabs on weight reduction efforts. I have a set of corner-weight scales sitting in my garage, so ...   11-07-2015 08:47 am

Tim Murphy wrote: Can you remove the convertible top and the frame? The frame is steel and very heavy. I think the gas tank needs to ...   11-07-2015 08:36 am

Preliminary list of planned modifications: Basic retrofit/removal retrofit Series 1 bumpers remove vapor control system remove spare tire & bracket remove stereo system replace stock battery w/lightweight AGM battery (8 lbs) Cockpit ...   11-07-2015 12:21 am

So a bit more about the car I'm starting with. It's a very mechanically sound vehicle that received what appears to be a relatively competent amateur ...   11-06-2015 11:58 pm

I recently purchased Jensen Healey #19064, a yellow 1974 JH5, with the intent to campaign the car in the SCCA's F Street Prepared autocross class. ...   11-06-2015 11:48 pm

Jensen Healey wrote: Welcome Steve! She looks great! Thanks! I look forward to having a British car to drive & wrench on again, after many years ...   11-04-2015 03:23 pm

I recently joined the ranks of Jensen Healey owners, picking up a yellow '74 (#19064) on Saturday. It's not a show car, but appears rust ...   11-04-2015 02:39 pm