On a 250 engine, here is the fuel pump gear train numbers and pump to crank cycle ratio
Crankshaft oil pump drive gear: 27T
Oil pump Driven gear: 33T
Ratio: .818:1
Fuel Pump Cam Drive Gear: 14T
Driven Gear: 47T
Ratio: .298:1
Overall Fuel Pump / Crank Ratio: .2437:1
Search found 13 matches
- Sun Feb 19, 2017 12:13 pm
- Forum: Vintage Ferraris
- Topic: Mechanical Fuel Pump Repair Questions
- Replies: 44
- Views: 45071
- Sun Feb 19, 2017 11:57 am
- Forum: Vintage Ferraris
- Topic: Mechanical Fuel Pump Repair Questions
- Replies: 44
- Views: 45071
Re: Mechanical Fuel Pump Repair Questions
One of the things a pressure gage tells you is whjether the checks are operating properly. If the gage is steady, all is OK. If the gage is bouncing around a lot, then you have a check problem.
Mine runs steady at about 4-1/2 psi.
Mine runs steady at about 4-1/2 psi.
- Sat Feb 18, 2017 3:52 pm
- Forum: Vintage Ferraris
- Topic: Mechanical Fuel Pump Repair Questions
- Replies: 44
- Views: 45071
Re: Mechanical Fuel Pump Repair Questions
The only reason that I rebuilt my fuel pumps was, because the car had been "resting" for near 20 years, I was afraid that modern fuel with ethanol might cause failures, or even fire.
- Sat Feb 18, 2017 12:18 pm
- Forum: Vintage Ferraris
- Topic: Mechanical Fuel Pump Repair Questions
- Replies: 44
- Views: 45071
Re: Mechanical Fuel Pump Repair Questions
The fuel pump on my GTE drove me nuts after a "rebuild". I added a pressure gage and it led me to a check valve issue. Going back to the original checks solved my problems
- Sun Jan 01, 2017 1:12 pm
- Forum: Vintage Ferraris
- Topic: Painting a V12 engine
- Replies: 14
- Views: 13302
Re: Painting a V12 engine
The green primer is probably zinc chromate
- Tue Nov 22, 2016 11:57 am
- Forum: Vintage Ferraris
- Topic: Vent window glass seal
- Replies: 10
- Views: 11755
Re: Vent window glass seal
Steele Rubber Products has the material that is speciffically for this job. The stuff comes in various thicknesses. I used it on my 275.
Steele makes repro rubber parts for many antuqie cars
Steele makes repro rubber parts for many antuqie cars
- Wed Jul 06, 2016 6:31 pm
- Forum: Vintage Ferraris
- Topic: Fuel Pickup Tube, 330 S-1
- Replies: 7
- Views: 7811
Re: Fuel Pickup Tube, 330 S-1
No apology necessary.
I know spellcheck can do some crazy things.
Good luck on getting the tube sealed.
Don
I know spellcheck can do some crazy things.
Good luck on getting the tube sealed.
Don
- Tue Jul 05, 2016 11:53 am
- Forum: Vintage Ferraris
- Topic: Fuel Pickup Tube, 330 S-1
- Replies: 7
- Views: 7811
Re: Fuel Pickup Tube, 330 S-1
Also, a bit of lubricant under the head of the "bolt" will help it slide on the washer and provide a better crush.
- Tue Jul 05, 2016 11:02 am
- Forum: Vintage Ferraris
- Topic: Fuel Pickup Tube, 330 S-1
- Replies: 7
- Views: 7811
Re: Fuel Pickup Tube, 330 S-1
When you annealed the washers, did you bring them to bright red and then quench in water - that will get them dead soft
- Sat Jul 02, 2016 1:21 pm
- Forum: Vintage Ferraris
- Topic: Colour in engine bay
- Replies: 2
- Views: 3287
Re: Colour in engine bay
On repainting the engine compartment of my 250 GTE, I removed the number plate on the firewall to display the original black paint. With some experimentation, I found, using Rustoleum, that a mix of 8 parts flat black to 10 parts satin black is very close to the original
- Sat Mar 19, 2016 8:04 pm
- Forum: Vintage Ferraris
- Topic: Anybody seen or used the repro stainless bumpers?
- Replies: 13
- Views: 12881
Re: Anybody seen or used the repro stainless bumpers?
As inconsistent as the older Ferrari bodies are, I'd be surprised if a reproduction bumper did fit "out of the box".
I had an early 275 GTB and a friend had one just a few serial numbers away. For the heck of it we compared some body parts - no match at all.
I had an early 275 GTB and a friend had one just a few serial numbers away. For the heck of it we compared some body parts - no match at all.
- Sat Mar 19, 2016 7:59 pm
- Forum: Vintage Ferraris
- Topic: Sealing the Tach Drive
- Replies: 7
- Views: 7850
Re: Sealing the Tach Drive
Mc Master Carr is a good supplier of metric "O" rings. You will probably be able to find one there. I'd go with Viton material
- Fri Aug 07, 2015 11:45 am
- Forum: Vintage Ferraris
- Topic: Mechanical Fuel Pump Issues
- Replies: 5
- Views: 5429
Re: Mechanical Fuel Pump Issues
When I rebuilt the mechanical fuel pump on my GTE, it drove me crazy because no matter what I did I could only get about 2-1/2 psi out of it. I could tell that the inlet check valves were leaking because I could blow back through them with the pump disassembled. The checks were new. In the end, it t...