Recent posts

#1

Maintenance and Modifications / Re: Jet height HIF 44

Last post by 94touring - Today at 06:00:35 AM

Gotcha. 35 degrees all in is probably too much but you'd really need to dyno it to see. Mine stopped making power around 32 degrees.  Running 94 octane will at least help keep it from detonating depending on if it likes that timing in conjunction with what compression ratio you're running. 

As far as jet height goes....install the damn wideband lol.  Till then you're guessing. 

#2

Maintenance and Modifications / Re: Jet height HIF 44

Last post by bikewiz - Today at 05:39:46 AM

Curious, why aren't you running a vacuum advance?

I'am. I edited the wording to "vacuum disconnected" I set the static timing to 10 degrees without the vacuum attached, most of the British guys recommend that as a starting point. With the somewhat lumpy cam this engine has, the Haynes recommendation of 8 degrees and 900 rpm idle doesn't work.
You also get tons of guys that "just turn the distributor until in runs right" I found a pretty stable idle with it set like this.

#3

Maintenance and Modifications / Re: Jet height HIF 44

Last post by 94touring - May 07, 2024, 08:35:38 PM

Curious, why aren't you running a vacuum advance?

#4

Maintenance and Modifications / Jet height HIF 44

Last post by bikewiz - May 07, 2024, 08:28:22 PM

So I've yet to install my wide band O2 sensor and gauge ( a bit of being lazy, not wanting to lay under the car, and not wanting to destroy the Jethot coating) so I've been trying a bunch of different needles in my carb. I have a write up from Keith Calver on the initial jet height to get the car to start and run of .060 to .075. My car starts and runs pretty well but doing plug chops to check the fueling it's running a bit rich. My question is; short of raising the jet height until it won't start/run has anyone measured the jet height from the bridge for the minimum height, I'm at .060 now. 

Some specs: A+ 1293, unknown cam, definitely not stock, good compression across all cylinders, valves adjusted, new HIF 44 carb with a BCE needle, new 65D dizzy, new plugs gapped to .032, new wires, the correct .9ohm coil according to AC Dodd , static timing set to 10 degress  (vacuum disconnected) idle set to 1000 rpm, advance of 35 degrees @ 4000 rpm. Also running 94 octane non-ethanol unleaded.

#5

The Lounge / Re: Freon costs

Last post by 94touring - May 07, 2024, 07:33:41 PM

I have some r12 on the shelf in the shop for the rx7. One day I'll get around to recharging it lol

#6

The Lounge / Re: Freon costs

Last post by MiniDave - May 07, 2024, 06:52:12 PM

Yes, but there is a temporary respite via converting to 134A, however your A/C system will work about 25% less efficiently, and it will take a while to get the car cooled off.

#7

The Lounge / Re: Freon costs

Last post by BruceK - May 07, 2024, 06:50:01 PM

Not the same thing, but R12 refrigerant  used in the a/c systems of 30+ year old cars is just a little bit pricey these days.

#8

The Lounge / Re: F1 - 2024

Last post by 94touring - May 06, 2024, 12:06:18 PM

Speaking of F1. I managed to end up in Miami this weekend and was invited out to some special F1 event with a group of people.  Anyway, I met a guy who represents Nascar drivers here doing something for f1 and we got talking cars, so long story short I have access to Nascar races now hanging with the drivers and garages. 

Well if you can share the joy, I would love that for the NASCAR race at Circuit of the Americas.

Ha!  Yeah I need to look up the schedule. I've been dealing with a ton of stuff at home, being pulled 20 different directions. Part of the reason for me going to Miami was to undwind!  I need to go back to my day job for downtime lol. 

#9

The Lounge / Re: F1 - 2024

Last post by Brit_in_TX - May 06, 2024, 10:14:47 AM

I was so happy for Lando, even if I did get a spoiler as they were showing the race in the bar at the furniture store. He has missed out a number of times and really deserved for the luck to come with him. I remember the race in Russia where he could have won but it rained!

#10

The Lounge / Re: F1 - 2024

Last post by Brit_in_TX - May 06, 2024, 10:07:23 AM

Speaking of F1. I managed to end up in Miami this weekend and was invited out to some special F1 event with a group of people.  Anyway, I met a guy who represents Nascar drivers here doing something for f1 and we got talking cars, so long story short I have access to Nascar races now hanging with the drivers and garages. 

Well if you can share the joy, I would love that for the NASCAR race at Circuit of the Americas.