The Pinto and Fox Mustang racks are 2-3" wider at the joints making bump-steer a real problem.  Delta sells rebuilt racks for a few $100 ...   03-01-2006 06:09 pm

I have witnessed this correlation between oil pressure and throttle position that you are describing in several JHs.  However, the difference I've seen is only ...   02-26-2006 07:38 pm

Just an update.... My machinist cc'd a set of Delta's Flat-top pistons at 8.5cc I re-measured a 0.020" decked head with mineral spirits w/ a little ...   02-18-2006 05:50 pm

Yeah...let's not do it the 'right' way. As Tim points out any machine shop CAN do it the 'right' way.  The problem is finding a machinist that WILL ...   02-07-2006 12:42 am

Norm, A quick check of one of my 4sp axles shows both hub thicknesses ~0.315".  While your hubs may be different thicknesses, I'm willing to bet ...   02-06-2006 04:05 pm

Isn't this the most-fun JH subjet of them all???? First things first, if there is no valve clearance on 3 valves, chances are at least one ...   02-05-2006 06:17 pm

Just giving you a hard time Ron... Seriously, as I've mentioned before, I think the #1 upgrade to the JH oiling system is going to 180^ ...   01-19-2006 12:51 am

Ron, Didn't your son send me a pic of your snapped crankshaft?  Maybe that had something to do with it?????  lol Judson ...   01-18-2006 08:08 pm

Andy, I need a hood to complete the bodywork on my E-prod car.  Come to think of it, 13492 could also use a new windshield as ...   01-08-2006 12:36 am

Exactly... Who in their right mind would want to be in a car that doesn't meet 1975 roll-over requirements, has no side-impact protection, no crush zones, ...   12-28-2005 01:25 pm

Norm, The 5-sp cars have a 3.45:1 ratio while the 4sp cars have a 3.73:1 ratio, both look VERY similar.  Confusing matters is the early 4sp ...   12-27-2005 05:38 pm

TXJH, I don't know what the stock thickness is, however, the SCCA madates a minimum of 0.060" for steel floorboards replacing non-metalic ones, and 0.080" for ...   12-23-2005 12:39 pm

Happy holidays Latch, and a potential welcome to the fold. Like many LBCs, the JH can't really be separated into diffent models by hard production dates ...   12-23-2005 12:35 pm

For some reason, JHs aren't very kind to oil pumps.  A used one is worth a try, but I'd suggest getting a new one.  I ...   12-13-2005 07:34 pm

Joel, You are describing a common oil pressure issue, and Brett has some good ideas about the carbs.  If I had to bet, I'd say your oil pump rotors ...   12-13-2005 02:32 pm

Since I had nothing better to do today, I decided to compare my calculations to emperical data.  This is what I found: Combustion Chamber Volume (Head):  ...   12-10-2005 07:07 pm

Check the JHP photo gallery... http://jhppg.com/gallery/album08/Completed_Engine   ...   12-08-2005 11:51 am

Welcome to the fold.... There are only two choices for the rear-end ratio:  3.73:1 (4speed cars) & 3.45:1 (later 5speed cars).  There are plenty of guys ...   12-01-2005 07:43 pm

Ed, In my experience, JH's and fuel pumps just don't get along.  While Greg Fletcher has had incredible luck, mine has been extremely poor with the ...   11-20-2005 12:16 am

I've seen this 'groove' a number of times on neglected engines.  It's just where the original seal has worn to the point the spring inside is ...   11-20-2005 12:05 am

We engineers aren't lazy...we're just taught to make the math easy, which is much easier than taking a pipet and physically measuring the CC like ...   11-16-2005 08:40 pm

Erik, Congrats on receiving your new toys...and a full 6 weeks before Christmas!  lol I too have an Excel BH on my Supra 5sp, but haven't yet ...   11-04-2005 04:56 pm

My neurons are exploding!!!!  lol  But seriously, now I think we're finally getting somewhere... So if I understand what you're saying, there is power-jet and non-power-jet version ...   11-01-2005 01:23 pm

Erik, The choke 'mystery' is easily solved, and it's based more on cam lift and engine breathing efficiency.  38mm chokes correspond to a theoretical maximum HP ...   10-31-2005 01:00 pm

Tim, Running the Spec9 on my 2.0, I couldn't get the exhaust temp over 1200^F.  I also had terrible throttle response, and was black-flagged at Roebling Road for ...   10-31-2005 02:09 am

Tim, I don't know where the Spec5 (160mains) came from, and it's exactly what I received from DBE years ago, but the jets are WAY off.  ...   10-29-2005 01:35 pm

Tony, When the engine got new rings, did the mechanic have a machinist hone the cylinder liners?  and no, that 3-stone shoe honer you attach to a ...   10-28-2005 06:20 pm

Actually, per SCCA Production rules,  the rear drums can be replaced with any solid disc brake that does not exceed the diameter of the front rotors. ...   10-27-2005 09:07 pm

Norm, A local drive line shop should be able to re-use your flanges from the 2-piece.  If not, keep in mind the 4sp uses two different ...   10-26-2005 01:15 am

Dave, I don't believe there is a documented case of a 9xx series head not fitting on a different 9xx series block or vice-versa.  I for one ...   10-26-2005 01:07 am

Norm, The slip-yoke driveshaft you're referencing is commonly known as the 'one-piece' driveshaft available from Delta Motorsports.  The 2-piece was supplied on all JH5s and GTs.  ...   10-25-2005 03:28 pm

Dave, Casting numbers aren't always the best indicator.  The easy way to tell is looking at the dimensions of the intake ports compared to an intake ...   10-25-2005 03:23 pm

Actually, one thing we didn't mention is excessive blow-by.  If your piston rings are shot, you'll have excessive oil temp which will cause the water ...   10-17-2005 05:39 pm

This is one of those "while you're at" it kind of things. Like all cars, getting to the head gasket requires removing the entire intake and ...   10-17-2005 05:32 pm

The Lucas unit I have exhibits the same behavior as above. Keep in mind both alternators only put out a maximum of 30-35amps.  Of course the ...   10-17-2005 01:06 am

Thurman, To know the 907 is to love it...most don't understand what it is, its potential or its quirks.  The MkI version of the 907 found ...   10-14-2005 01:44 pm

Joel, It's either fire or gas. Power goes from the battery, to the key, to the tach, to the coil, to the distributor.  If anything in this ...   10-12-2005 03:57 pm

The JH ignition wiring can be a bit screwy.... There is a lead from the Tach that connects to the ballast resistor.  Juice goes through the ...   10-12-2005 01:42 pm

The shocks Delta sells are actually modified KYB units, so there is no direct drop-in part number.  At roughly $50ea they're a pretty good deal.  The ...   10-11-2005 12:39 pm

John, In my opinion, it's one of those "while you're at it" kind of things.  If you replace the bushings, you have to tear apart ...   10-11-2005 12:33 pm