Fitzy Posted January 10, 2007 Report Share Posted January 10, 2007 Tried a few searches haven't really seen anything close to what Im trying to find out, hopefully this isn't too much of a n00b question.Is it possible to +T a 96 850 NA Engine? I know that is a VERY general question. My reason for asking is that I'm interested in what steps could be taken to convert said NA engine into a Low Compression Turbo comparable to stock 850 T/T-5/R. Any details would be helpful. Thanks. Note: This is just an idea for a project in tearing an engine down and seeing what could be done, I know it may not be able to be done and that's totally fine with me. Link to comment Share on other sites More sharing options...
Keaton85 Posted January 10, 2007 Report Share Posted January 10, 2007 Tried a few searches haven't really seen anything close to what Im trying to find out, hopefully this isn't too much of a n00b question.Is it possible to +T a 96 850 NA Engine? I know that is a VERY general question. My reason for asking is that I'm interested in what steps could be taken to convert said NA engine into a Low Compression Turbo comparable to stock 850 T/T-5/R. Any details would be helpful. Thanks. Note: This is just an idea for a project in tearing an engine down and seeing what could be done, I know it may not be able to be done and that's totally fine with me.better off finding an old used HPT engine to build up... the block determines the CR if my memory is correct...Edit: there are some topics around that have said NO to this... if you want a turbo block to work on i have one sitting around some place.. Link to comment Share on other sites More sharing options...
WhiteR Posted January 10, 2007 Report Share Posted January 10, 2007 better off finding an old used HPT engine to build up... the block determines the CR if my memory is correct...Yeah thats right, the compression ratio is completely different in the NA's than in the HPT's, but it's possible. Link to comment Share on other sites More sharing options...
Fitzy Posted January 10, 2007 Author Report Share Posted January 10, 2007 better off finding an old used HPT engine to build up... the block determines the CR if my memory is correct...Yeah it does, Na's are 10:3:1 and HPT's are 8:5:1. There are some other compression variances in there as well. I'm wondering if you can change engine components to lower compression, just my in-experience of not knowing. Link to comment Share on other sites More sharing options...
Gioseppe Posted January 10, 2007 Report Share Posted January 10, 2007 Yeah thats right, the compression ratio is completely different in the NA's than in the HPT's, but it's possible.that's correct, the pistons determine the compression ratio in these motors. the heads are the same.if you do it right, an NA engine that's been turbo'd would put down some serious numbers.all in all, it's doable, but you'd need some serious tuning and it would be stuck running on premium pump gas, if not higher octane. Link to comment Share on other sites More sharing options...
Keaton85 Posted January 10, 2007 Report Share Posted January 10, 2007 that's correct, the pistons determine the compression ratio in these motors. the heads are the same.if you do it right, an NA engine that's been turbo'd would put down some serious numbers.all in all, it's doable, but you'd need some serious tuning and it would be stuck running on premium pump gas, if not higher octane.the blocks are the same? haha im kinda interested now becuase i have a few turbo and N/A engines that i would like to tinker with..Edit: other then the 2.4L and 2.3L difference.. the 80mm and 82mm pistons correct? Link to comment Share on other sites More sharing options...
ArmyINFDoc Posted January 10, 2007 Report Share Posted January 10, 2007 high compression turbo car would be pretty sweet ride Link to comment Share on other sites More sharing options...
Keaton85 Posted January 10, 2007 Report Share Posted January 10, 2007 high compression turbo car would be pretty sweet rideLPT is high CRP.S. still wanna buy my car, im willing to take an offer:) Link to comment Share on other sites More sharing options...
ArmyINFDoc Posted January 10, 2007 Report Share Posted January 10, 2007 all i have is 1200 dollars cash, a 1995 glt 5speed and a 1996 850Ris that good? Link to comment Share on other sites More sharing options...
Keaton85 Posted January 10, 2007 Report Share Posted January 10, 2007 all i have is 1200 dollars cash, a 1995 glt 5speed and a 1996 850Ris that good?PM me, could be interested! Link to comment Share on other sites More sharing options...
Gioseppe Posted January 10, 2007 Report Share Posted January 10, 2007 the blocks are the same? haha im kinda interested now becuase i have a few turbo and N/A engines that i would like to tinker with..Edit: other then the 2.4L and 2.3L difference.. the 80mm and 82mm pistons correct?correct, besides different bore and pistons (that determine the CR) the blocks, crank, and rods are the same iirc. Link to comment Share on other sites More sharing options...
thelostartof Posted January 10, 2007 Report Share Posted January 10, 2007 thread started off with me wanting to smack a b****ended w/ me a little more calmas said blocks are identical sans for the oil feed and return holes drilled out or not, and the bore size, otherwise the rods/crank are all the same. just as said abovepistons are what determines the CRthere is still talk about the heads as a few have found some R cars DO have different model heads (can not remember who i talked about this with)a 10.3:1 (n/a block) w/ a turbo would make gob loads of torque and have killer throttle response. it would also spool VERY quick. sure it takes a custom tune but would make a VERY fun engine.ideal w/ some forged rods and 9:1 CR(lpt engines are this) is what more 400-600hp engine like to aim for Link to comment Share on other sites More sharing options...
Keaton85 Posted January 10, 2007 Report Share Posted January 10, 2007 thread started off with me wanting to smack a b****ended w/ me a little more calmas said blocks are identical sans for the oil feed and return holes drilled out or not, and the bore size, otherwise the rods/crank are all the same. just as said abovepistons are what determines the CRthere is still talk about the heads as a few have found some R cars DO have different model heads (can not remember who i talked about this with)a 10.3:1 (n/a block) w/ a turbo would make gob loads of torque and have killer throttle response. it would also spool VERY quick. sure it takes a custom tune but would make a VERY fun engine.ideal w/ some forged rods and 9:1 CR(lpt engines are this) is what more 400-600hp engine like to aim forSo what are good things to save on old N/A and turbo engines that have high miles and are not worth installing in anything? blocks, heads, anything? I'm just asking becuase i have a few engines that i wanna do something with or else they are going to the scrap yard...maybe build one up idono! Link to comment Share on other sites More sharing options...
thelostartof Posted January 10, 2007 Report Share Posted January 10, 2007 So what are good things to save on old N/A and turbo engines that have high miles and are not worth installing in anything? blocks, heads, anything? I'm just asking becuase i have a few engines that i wanna do something with or else they are going to the scrap yard...maybe build one up idono!blocks and cranks and heads you will want to save .. the rest can all be replacedn/a blocks typcially are better for turbo use because the engines usually see less abuse and less cyl wear .. but then again the turbo blocks do have a smaller bore which mean thicker cyl walls so ... redblock wise most like the n/a blocks because after 300k the engines can love perfect inside because they have never been driven hard Link to comment Share on other sites More sharing options...
Gioseppe Posted January 10, 2007 Report Share Posted January 10, 2007 Actually, i just tooled around in Vadis and i found out some good info. 93 B5254S(auto and man) - 95 B5254S (Man only) heads are the same. P/N: 9146335 95 B5254S (Auto Only)/96-97 B5254S(NA/GLT) and 94-97 B5234T(TURBO) heads are the same. P/N: 9146337 98 B5254T(T5), B5254S (N/A) and B5234T3 (V70R?) all use the same head, P/N: 811178Does anyone know if swapping a pre vanos head for another model pre vanos head would net a positive performance gain?Also, 99+ all have exhaust side vanos, and as far as i know they can't be retrofitted into a non vanos car (someone please chime in, if you can swap a vanos head onto a non vanos block and just delete the vanos with non vanos cams would that work?) i know that the vanos heads supposedly flow better than the non vanos heads, but is it worth a shot to try and swap them? Link to comment Share on other sites More sharing options...
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