I don't want to oversimplify your question, but there is some merit to the phrase:  oil is oil.  Chose a viscosity that keeps oil pressure ...   06-14-2005 03:44 pm

Ron, I think you have the right idea...let's get the car on the track, sorted and start having fun.  Worry about what the scrutineers when ...   06-14-2005 03:15 pm

As Mark points out, the easy thing is call Delta. Option 2 is to go aftermarket and install a copper line that will last forever.  This ...   06-12-2005 08:55 pm

From the 2005 GCR: 17.1.4 Improved Touring Category D.  Authorized Modifications 1.  Reciprocating Engines l.  Manifold & Cylindr head port matching is permitted.  No material may be removed further ...   06-12-2005 03:25 pm

The head in the pic with the larger intake ports is the very one I'm currently running on the 907/910 hybrid with a hotter version of ...   06-12-2005 12:48 am

We've discussed cams at length elsewhere on this board...you may want to do a search.  Also, Greg has done a lot of explaining in the ...   06-10-2005 08:33 pm

tlj, Where are you located? Some of my work:  http://shorpac.com/v-web/gallery/album08 Judson ...   06-09-2005 12:23 am

Glad it helped Jim. A 30sec fix....maybe...too bad it took me years of playing around with these cars to discover little things like this! Jensen:  It's not a ...   06-05-2005 04:16 pm

Jim, The stock ignition system has an additional relay built into the starter.   When you engage the starter, this relay applies 12V directly to the coil (bypassing ...   06-05-2005 01:25 am

Wayne, My car probably has the most elaborate and expensive solution to venting the crankcase: http://shorpac.com/v-web/gallery/album08/910_907_hybrid2 I've plumbed the crankcase breather into a catch can to separate any ...   06-03-2005 12:35 am

Paul, RHD is a problem according to Garry Kemp who gave me the inspiration to do my swap.  He did it, but told me it took ...   06-01-2005 06:53 pm

Ron, The Vauxhall LDS is part of a completely different axle purportedly code named '052'.  As you're aware, changing the entire axle wouldn't be IT legal.  ...   06-01-2005 06:38 pm

As Tim points out, all later versions of the 907 (i.e 910/911/912/920) are wider below the split-line of the crank, and require modification of the front ...   06-01-2005 02:43 pm

Jim, Every car and every cooling system is different, so I couldn't tell you for certain what will or will not work for you.  With that ...   05-26-2005 06:32 pm

Jim, I do so much work on my car that the 'pusher' type is my favorite to make as much room as possible. http://shorpac.com/v-web/gallery/album08/910_907_hybrid2 I'm using a 10" ...   05-25-2005 08:00 pm

Dan, This is precisely why I don't much care to do work on the earlier engines... The only way to replace the rope-seal is to remove the ...   05-23-2005 01:43 pm

Kurt, I'm going to agree with Mark in that the pump probably isn't the area that needs the most improvement.  As long as you have a ...   05-21-2005 06:39 pm

Kurt, The only thing I'd add is what Garry Kemp pointed out to me years ago, and that was the early 907 intake ports are ...   05-12-2005 12:51 pm

Pete, Thank you for posting your dyno results.  About a year or two ago, Russ and I both tried to organize 'dyno-days' in our respected parts ...   05-11-2005 07:01 pm

Ron, One school of thought is to send your head to a Lotus expert like West Coast Racing Cylinder Heads and let Richard work some magic...like ...   05-03-2005 01:45 am

Tim, I got one of those cranks with the 1986 HCI engine I bought a few years ago.  That rear pilot bearing is HUGE!  Fortunately, the ...   05-02-2005 01:27 pm

Tim, How about specs for the N/A Esprit 2.2?  My 107 cam specs differ from the 107 specs you listed, and I think they may be an ...   05-02-2005 01:17 pm

Ron, If I'm read the IT rules correctly, I think you may be stuck using the cam timing that was available with the car as delivered ...   05-02-2005 12:48 pm

The lift is easy enough:  Lobe Height - Base Circle I just found an old set of notes that suggest the other 'flavor' of 107 cams ...   05-01-2005 12:08 am

Kurt, I have a set of cams with the 777777 marking, but in another thread I've asked Greg Fletcher for the specs on the 107 cams available ...   04-30-2005 11:17 pm

Greg, What is the gross lift and duration of the 'flavor' of 104 and 107 cams available in the JHPS store?  I think I've got ...   04-30-2005 12:02 am

Ron, Sorry, but you're actually not the first guy to run a JH in ITS trim.  There are at least (2) cars here in Atlanta that ...   04-28-2005 08:56 pm

Ron, Any reason why you didn't go with coil-overs mounted to the stock p/u points?  It seems you would have had a lot more flexibility with ...   04-28-2005 08:49 pm

J- JHs tend to have a lot of blow-by by nature of the piston-to-wall clearance, and to complicate matters, the engine wasn't originally designed for Positive Crankcase Ventilation. The ...   04-26-2005 02:34 pm

No Gavin, I was in a hurry and didn't explain the procedure very well. In order to get to the crank, not only do you have ...   04-23-2005 03:28 pm

Brett, Letting the crankcase vent under the hood is like filling you house full of gasoline vapor and waiting for it to find the pilot light ...   04-21-2005 03:28 pm

Pat, I guess I can place myself in the 'sportrod' camp because I adapted a Later Lotus Excel Engine and Transmission to my JH.  I consider it ...   04-21-2005 03:20 pm

In order to get to the thrust washers the crank has to come out which means the front and rear cover have to be removed, ...   04-20-2005 12:04 am

Ron, The thrust washers are ~1/8" thick and aren't held into the block very securely.  I think you've lost the rear washer.  The bad news is ...   04-19-2005 05:35 pm

40-50psi "normal" for 3000-4000rpm highway cruising for a 907. by comparison I'm getting 70-75psi at 4000rpm with the 907/910 hybrid, but I also have a x-drilled ...   04-19-2005 04:49 pm

Ron, Are you referring to 'thrust' play?  Have someone engage the clutch...if the crank moves 1/8" forward, you've lost a thrust washer. Also, what kind of oil ...   04-19-2005 02:43 pm

Nigel, Your initial strategy is correct, however, many have found it necessary to hone all .030" rather than bore ~0.025" and hone the last 0.005".  The ...   04-19-2005 02:41 pm

Ben, Pre-1974-1/2 cars have a physical resistor which looks like a small 1/2"x1/2"x2" white brick mounted next to your coil.  Later cars have a Nichrome wire built ...   04-15-2005 01:29 pm

To richen the mixture all you need is a long handled hex tool.  The trick is, take the top off the carb and hold the ...   04-05-2005 01:13 am

Even with REALLY bad carbs, you should have some power under load.  However, if the jets are clogged w/ varnish, sand, etc., all bets are off.  ...   04-04-2005 07:48 pm