Ferrari Forums banner
1 - 20 of 35 Posts
G

·
Discussion Starter · #1 ·
Well the weather finally broke

Well the weather finally broke here in Upstate NY...and I got a chance to "try out" the new NGK Iriduim spark plugs in the BB.

Right off the bat, greatly improved low speed driveability when the engine is cold. (Realize it's about 45F here today, so the engine is "cold" for the first 20 minutes of driving...)
She runs much, much smoother than she did prior with the BP7ES plugs.

Another nice surprise was that the "transition phase" stumble was better...Not gone, but reduced somewhat.

The plugs (BPR7EIX) were sourced from www.ClubPlug.net

Regards,
David
 
G

·
Discussion Starter · #2 ·
This is with the MSD?
Gap?


This is with the MSD?
Gap?

This sounds like a definite thing to do.

best
rt
 
G

·
Discussion Starter · #3 ·
Russ,

The MSD (7AL-2&#4


Russ,

The MSD (7AL-2) has been a constant for many, many year is this car...as the original Dino/Digiplex unit proved to be marginal, at best. As the BB has no cold starting mechanism or enrichment devices, a start after a prolonged sitting could result in a (fouled) plug change.

The gap...after alot of thought, conversations with MSD and NGK, I arrived at .035". Keep in mind that the compression of my engine is now at 11:1 versus the stock 8.8:1. The higher compression required a .005"-.010" reduction in the gap I had planned on using. MSD wants big gaps...NGK says not to open the plugs larger than .008"-.010" than the nominal gap the plugs came with...

And larger plug caps (can) cause greater cap and rotor wear...

Honestly, I was totally amazed at the cold driveability, as this is NOT one of the BBs stong suits.

Regards,
David
 
G

·
Discussion Starter · #4 ·
So, on a 512BB I would use a B

So, on a 512BB I would use a BR8EIX gapped at 0.025 ?

Thanks, Grant
 
G

·
Discussion Starter · #5 ·
Grant,

The direct replaceme


Grant,

The direct replacement spark plug for the 512BB would be the BPR8EIX. If the ignition is still stock, a gap of .025"-.030" would work fine.

Regards,
David
 
G

·
Discussion Starter · #8 ·
Hmmmmmm I wonder if these wou

Hmmmmmm I wonder if these would work well in a carb 308 or Daytona? Which plugs would be best for each application?
 
G

·
Discussion Starter · #9 ·
Hi Terry,
As these cars have


Hi Terry,
As these cars have little or no direct intake manifold heating, cold running with carbs leave quite a be to be desired...particularly when the engines are "cold". Cold running on my 365BB has always been poor...with the first 5-10 minutes of running on a 40-60F degree morning not much fun.

After the car sat for two days...and this morning being 42F, only after a 2-3 minute "warm-up", she was very smooth and nicely driveable.

As to plug selection, you would use your currently selected heat range, which may or may not be what Ferrari recommended, and just purchase the Iridium eqivalent. The original plug heat ranges that Ferrari listed in the owners manuals were quite "cold", based on the premise that the cars would be drived WFO all the time. Use the plugs that are currently in your cars as your heat range reference point.

So, if your plug is a BP6ES, Iridium would be a BPR6EIX. Here's the link to the NGK site...

http://www.ngksparkplugs.com/apps/car_truck_suv/default.asp?nav=60000&country=US

Regards,
David
 
G

·
Discussion Starter · #10 ·
I noticed some plugs are BPR a

I noticed some plugs are BPR and some are BR....without the P that stands for "projected" I am told by the www.clubplug.com that the Boxer does not need the P. What is your opinion...should I purchase BPR 8 EIX or the BR 8 EIX? What is this projected stuff? I have a 83 512 BBi Boxer
 
G

·
Discussion Starter · #11 ·
>>I am told by the [ur

>>I am told by the www.clubplug.com that the Boxer does not need the P. What is your opinion<<

I agree that projected nose plugs are probably not needed by Boxers. My understanding is that "projected nose plugs" are for engines with poor swirl, poor distribution or poor chamber design and the nose projects to insure ignition of the charge under these poor conditions. That said, most 'standard' plugs have a projected nose and work well in all older Ferrari engines short of F1..

JRV
 
G

·
Discussion Starter · #12 ·
Coach: I have a set of plugs

Coach: I have a set of plugs sitting in front of me, that I just bought for my BBi------NGK BR8EIX. This was the recommended brand by several sources. Cost was about $6 each.
 
G

·
Discussion Starter · #13 ·
i ordered some today...6.50 ea

i ordered some today...6.50 each, from www.clubplug.com. Thanks Henryk. Now if someone can figure out my rich running problem on the passenger bank...before i take out the FD and have it rebuilt again....
 
G

·
Discussion Starter · #14 ·
Couch: If you suspect the FD,

Couch: If you suspect the FD, then why not have someone do an "Injected-quantity camparison" test on it? Do this to BOTH FDs and compare the values. This should easily tell you if one FD is off, related to the other. This would seem to be a logical step, especially after a FD rebuild.

I would like to get this tester.....how about it David?
 
G

·
Discussion Starter · #15 ·
Henry,

I'll make the ca


Henry,

I'll make the call tomorrow...
I can't say I've ever seen one of those test fixtures up close, but I do know exactly what you're looking for. I'll drop you note when I know availability and pricing.

Regards,
David
 
G

·
Discussion Starter · #16 ·
Thank you David. One could RE

Thank you David. One could REALLY fine-tune the injection system with this device.
 
G

·
Discussion Starter · #17 ·
Thank you David. One could RE

Thank you David. One could REALLY fine-tune the injection system with this device. It can tell the fuel delivery of each FD port individually, at idle, part and full throttle, on a K, or K-Jetronic system.
 
G

·
Discussion Starter · #18 ·
Henry,

True...Though adjust


Henry,

True...Though adjusting the specific port output of the FD is tricky...and I doubt that I could obtain the special shims/springs for "tuning".

An incredible diagnostic tool to have, though!

Regards,
David
 
G

·
Discussion Starter · #19 ·
David: I didn't think of

David: I didn't think of adjusting the port. I just wanted to see if the output would be the same for all 6, and that that output would match the 6 from the other FD. The adjustment would be of the plunger, to get all six in line from one FD to the other. If one port is off, then one knows the FD needs rebuilding by a professional.
 
G

·
Discussion Starter · #20 ·
Henry,

Got it...and here I


Henry,

Got it...and here I am trying to complicate this measurement even further. True, a good FD rebuilder will port balance the FD. I never though about the side to side FD balance issue(I guess too much time working on these carbed cars has affected my brain a bit...) HA!

Regards,
David
 
1 - 20 of 35 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top