Alternator 93 preserp
Discussion
Hi All
Having some problems in the charging department , have looked at previous threads and deduced its the alternator , (have no 100amp fuse and voltage readings are low , 13v no load and 11.5v with load) The ignition light only comes on over 3000 revs which seems a bit odd .
Have a magnetti marelli 127a 65amp - Is there an upgrade that would just slot right in as this alternator has only ever barely coped in the past and when the twin fans come on it causes a massive hiccup with the engine .
Any comments gratefully received
Having some problems in the charging department , have looked at previous threads and deduced its the alternator , (have no 100amp fuse and voltage readings are low , 13v no load and 11.5v with load) The ignition light only comes on over 3000 revs which seems a bit odd .
Have a magnetti marelli 127a 65amp - Is there an upgrade that would just slot right in as this alternator has only ever barely coped in the past and when the twin fans come on it causes a massive hiccup with the engine .
Any comments gratefully received
tvr4ever said:
I upgraded my old alternator with a Bosch 105 amp alternator. It bolts in without any problems. A friend of mine works at a place where they sell new and reconditioned alternaters, starters, etcetera. He sold me this one, it sure makes a difference, volt wise.
Hi , any idea of the model number , sounds just the ticket .Paul
spend said:
If your electrics & alt are in good order, I don't really see the need for a bigger one (ooeerrr). A bigger alt will sap more power as I understand things 
Dave
Hi Dave , Dave
I`ve come out of hiding again , nice to see your still about .
The Serp engine has a standard 100amp alt so shouldn`t be a problem for the earlier more powerful engines (he! he! Bring it on!!)
olemisery said:
tvr4ever said:
I upgraded my old alternator with a Bosch 105 amp alternator. It bolts in without any problems. A friend of mine works at a place where they sell new and reconditioned alternaters, starters, etcetera. He sold me this one, it sure makes a difference, volt wise.
Hi , any idea of the model number , sounds just the ticket .Paul
From what he told me, the main thing you have to know when you order an alternator, is the position of the (he calls them ears) points where you bolt the alternator to the brackets. He told me that my alternator had the (?) ears at 10 past 6, according to him thats what you need to know. When you look at the front of the alternator, you can see the ears at exactly 10 past 6.
The reason i went for a bigger alternator was this. I have an upgraded radiator and the fans from a Griffith 500, they suck loads more power. I had already fitted the Xcellent 2 Speed fancontrol from electronic Wizard David (ModWise)which has a direct feed from the starter, so plenty of juice available. I do several trackdays each year, and some spirited driving on Italian mountain passes every year, so the fans must shift loads of air. They use a lot of amps, more than the standard ones, so therefore the 105 amps alternator comes in handy.
And the fact that my old one was kaput and my m8 had this one on the shelf helped with the choice.
I would love to give you the number, if i knew what it was. My mate got it from his work, he sells and reconditions them. I will try to get a number from him.
From what he told me, the main thing you have to know when you order an alternator, is the position of the (he calls them ears) points where you bolt the alternator to the brackets. He told me that my alternator had the (?) ears at 10 past 6, according to him thats what you need to know. When you look at the front of the alternator, you can see the ears at exactly 10 past 6.
The reason i went for a bigger alternator was this. I have an upgraded radiator and the fans from a Griffith 500, they suck loads more power. I had already fitted the Xcellent 2 Speed fancontrol from electronic Wizard David (ModWise)which has a direct feed from the starter, so plenty of juice available. I do several trackdays each year, and some spirited driving on Italian mountain passes every year, so the fans must shift loads of air. They use a lot of amps, more than the standard ones, so therefore the 105 amps alternator comes in handy.
And the fact that my old one was kaput and my m8 had this one on the shelf helped with the choice.
[/quote]
Thnaks for info , have managed to find a Bosch 100amp and changed/spaced the pulley for my preserp , upgraded the wiring to starter contact to cope with additional amps . Runs brilliantly & seems to have smoothed out the engine with no hiccups under load .
Thanks all
From what he told me, the main thing you have to know when you order an alternator, is the position of the (he calls them ears) points where you bolt the alternator to the brackets. He told me that my alternator had the (?) ears at 10 past 6, according to him thats what you need to know. When you look at the front of the alternator, you can see the ears at exactly 10 past 6.
The reason i went for a bigger alternator was this. I have an upgraded radiator and the fans from a Griffith 500, they suck loads more power. I had already fitted the Xcellent 2 Speed fancontrol from electronic Wizard David (ModWise)which has a direct feed from the starter, so plenty of juice available. I do several trackdays each year, and some spirited driving on Italian mountain passes every year, so the fans must shift loads of air. They use a lot of amps, more than the standard ones, so therefore the 105 amps alternator comes in handy.
And the fact that my old one was kaput and my m8 had this one on the shelf helped with the choice.
[/quote]
Thnaks for info , have managed to find a Bosch 100amp and changed/spaced the pulley for my preserp , upgraded the wiring to starter contact to cope with additional amps . Runs brilliantly & seems to have smoothed out the engine with no hiccups under load .
Thanks all
Gassing Station | Griffith | Top of Page | What's New | My Stuff