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hey guys i have a HJ Statesman. 308 T400. its very original. single exhaust. 4 barrel rochester and points. been told if i fit eletronic ignition and twin system and get the carbie done to suit. i will get better fuel. the carbie is a reco one from hume performance but just bolted on. would that pick up more power also? At the moment my wifes corolla will flog it off the lights.
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How close to Hume do you live? Might pay to visit them for some fine tuning. When Hume do the carbies, they bolt them onto a 350 to adjust. Sometimes the carby is set a little rich and they say to bring it in on the car and they will adjust. My feelings are the carby is running rich. Pull a plug out and see if it is too rich.
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A std single exhaust that HJ came out with just kills 308's all over.
Go twin pipes. points are fine but make sure that your vacuum advance is working it's only real purpose is fuel economy, on a highway with it not working = 16 MPG and working = 22 MPG on my old 308.
There are a few tricks to jetting carbys and to lean is not one.
As long as the engine is fine all should be fine but you may have a high ratio diff and it will not be that fast off the line and T400 kill power.
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A lot of statesmans had 2:78 diff gears not much fun for take off,3 ;08 ratio is a lot better all rounder if your not worried about it being stock go for extractors to make it breathe easier too!
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I bought a slightly increased stall torque converter for my L31 M41 GU7 HJ Premier to attempt to overcome the doughy bottom end with the 2.78 diff. Not sure yet if i'll put extractors on it, but i'm replacing the original single system with a 2.5" single and Lukey muffler.
I'm also replacing the original dizzy with a HEI one, and removing the 600 Holley to refit the original (rebuilt) Quadrajet. All of this should help to waken it up a little. |
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Thanks for the ideas. i put a new line from the carbie to the vacuum advance on the dizzy. i dont know how to check to see if its working anyway. i took a plug out and it is a light brown. my guess its alittle lean. i worked out im getting 21 litres per 100kms.
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I am about to put a 253 in my ute in the next few weeks. What milage do you think I should expect?
I am going to be running extracters with a 350 Holley. Other then that, all is stock. Unsure if I am going duel or single exhaust yet!
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quote:
Originally posted by HQ Sandman
I am about to put a 253 in my ute in the next few weeks. What milage do you think I should expect?
I am going to be running extracters with a 350 Holley. Other then that, all is stock. Unsure if I am going duel or single exhaust yet!
Auto - manual, diff ratio, are you a lead foot, motor work. All factors in to the end result....
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quote:
Originally posted by HK1837
I bought a slightly increased stall torque converter for my L31 M41 GU7 HJ Premier to attempt to overcome the doughy bottom end with the 2.78 diff. Not sure yet if i'll put extractors on it, but i'm replacing the original single system with a 2.5" single and Lukey muffler.
I'm also replacing the original dizzy with a HEI one, and removing the 600 Holley to refit the original (rebuilt) Quadrajet. All of this should help to waken it up a little.
2.78 diff is th problem byron. good economical diff over 120klm/hr but useless under that. 3.08 ratio would make a decent difference to both power & ecomomy regards DD www.bellarineclassicautos.com.au
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quote:
Originally posted by Jvanner
Thanks for the ideas. i put a new line from the carbie to the vacuum advance on the dizzy. i dont know how to check to see if its working anyway. i took a plug out and it is a light brown. my guess its alittle lean. i worked out im getting 21 litres per 100kms.
Use a timing light or to see if the vacuum canister is working put the vac hose on one of the manifold pipes that you can feel is sucking at idle pop it on and you will hear the engine rev's go up a bit and pop it of and rev's will drop. A lot of these canisters are buggered now days and it pays to clean up the old dizzy make sure the springs are ok and that it is greased where slides to advance.
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quote:
Originally posted by KeithA
quote:
Originally posted by HQ Sandman
I am about to put a 253 in my ute in the next few weeks. What milage do you think I should expect?
I am going to be running extracters with a 350 Holley. Other then that, all is stock. Unsure if I am going duel or single exhaust yet!
Auto - manual, diff ratio, are you a lead foot, motor work. All factors in to the end result....
Manual with a 308 LSD. Nah, not a lead foot and the motor isn't worked. Hoping I get better fuel milege then the 202. Sorry to hack your thread!
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