305 HO in a 91 camaro RS
Thread Starter
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Newbie
Joined: Mar 2008
Posts: 4
305 HO in a 91 camaro RS
hello everyone. im from Syracuse, New York and my friend recently bought a 91 camaro RS with a 305 HO engine.
me, even though i enjoy camaros, dont really know much about them, so ive been doing a little bit of reading for him. hes having trouble finding a few mods for his car which hes lookin to buy, such as a new intake/ performance injectors / distributor.
i explained to him the concept of getting bigger injectors and tuning the car, but he kept saying 'performance injectors are what i need' >.<
also told him to get an MSD distributor, but he wouldnt listen to that either...apparently theres a varied selection.
regardless, itd be great if you guys could point me in the right direction on where theres some really good writeups about the car, and a certain website or two that is dedicated to selling parts for this type of car and engine. thanks, i appreciate it!
me, even though i enjoy camaros, dont really know much about them, so ive been doing a little bit of reading for him. hes having trouble finding a few mods for his car which hes lookin to buy, such as a new intake/ performance injectors / distributor.
i explained to him the concept of getting bigger injectors and tuning the car, but he kept saying 'performance injectors are what i need' >.<
also told him to get an MSD distributor, but he wouldnt listen to that either...apparently theres a varied selection.
regardless, itd be great if you guys could point me in the right direction on where theres some really good writeups about the car, and a certain website or two that is dedicated to selling parts for this type of car and engine. thanks, i appreciate it!
1st Gear Member
Joined: Mar 2007
Posts: 157
From:
RE: 305 HO in a 91 camaro RS
www.summit.com
www.jegs.com
they have parts for anything there. if its the original motor then its probably tuned port injected (TPI). it doesnt sound like you two dont havemuch experience in this kind of stuff so i dont really want to get you in over your heads. if your looking for big power i would recommend swapping out the 305 and putting a 350 or 383 stroker in.
putting bigger injectors in alone wont do much but give you worst gas mileage and possibly run a little crappy. if you add bigger injectors then you would need to make the motor need that much more gas such as adding better heads, cam, intake.
www.jegs.com
they have parts for anything there. if its the original motor then its probably tuned port injected (TPI). it doesnt sound like you two dont havemuch experience in this kind of stuff so i dont really want to get you in over your heads. if your looking for big power i would recommend swapping out the 305 and putting a 350 or 383 stroker in.
putting bigger injectors in alone wont do much but give you worst gas mileage and possibly run a little crappy. if you add bigger injectors then you would need to make the motor need that much more gas such as adding better heads, cam, intake.
Overdrive Member
Joined: Jul 2006
Posts: 4,248
From:
RE: 305 HO in a 91 camaro RS
If it is an original motor then it would not be an HO and it would be a 305 TBI (RS had the 3.1 MPFI V6 and an optional 5.0 TBI V8) There are intakes. Edelbrock should definatly have one and either 350 TBI injectors or maybe a holley TBI unit.
August 2009 ROTM
Joined: Sep 2007
Posts: 1,143
From: Lima, OH and Ft. Lauderdale, FL
ROTM Winner's Club
RE: 305 HO in a 91 camaro RS
Injectors dont do crap unless you have supporting mods as mentioned. TBI motors suck power wise, I would suggest dropping a carbed 350 in there.
1st Gear Member
Joined: May 2007
Posts: 174
From:
RE: 305 HO in a 91 camaro RS
any type of fuel injection is light years ahead of carbueration (if thats a word, lol). i'd drop a 350 in it and just hook up the stock tpi system to it. the tune port system is more fuel efficient and less maintenance, bcuz with the carb you have to get them rebuilt and jetted, not to mention having to deal with chokes and stuff. you get quicker throttle response with fi (if injectors are clean). 300hp carb motor < 300hp fi motor
Thread Starter
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Newbie
Joined: Mar 2008
Posts: 4
RE: 305 HO in a 91 camaro RS
yeah, its a 305 TPI engine, not carbed. i dont have much experience with muscle-ish cars, mainly because my dad knows what they are, how much power they produce and wont let me get one 
but, the owner of this car really wont go for a motor swap at all...unfortunately. too much work and money. he says he plans on putting a new crankshaft and cams in over the winter.
oh, and on a side note, this is coming from *his* mouth, not mine. personally i think its a stupid move to swap cranks unless there is VERY good reason to do so, such as bearing failure or somethign similar and it gets scarred/unbalanced.
i know about the injectors thing...itll just add more fuel and he wont have any way to compensate. unfortunately, he doesnt really understand the concept of this lol. i asked him why he wanted 'performance injectors', just to see if he had a response, and he replied 'more performance'. yeah, ok.
mike: i couldve sworn some HO 305s came in camaros, but if you insist that its not, ill take your word for it. the only difference is the 305 has a 350 head, right? and ill check into edelbrock intakes for him at least, thankee.
mechanic: yup, thats what everyones saying lol. things can be done to them, but theyre limited and more expensive.
purpl: i agree with you wholeheartedly, but unfortunately it doesnt change how much you can do to the 305. hes not looking for a motor swap, hed be in over his head, no offense to him =X
could someone explain why TPI is so much harder to upgrade/mod than a carbed car?
but, the owner of this car really wont go for a motor swap at all...unfortunately. too much work and money. he says he plans on putting a new crankshaft and cams in over the winter.oh, and on a side note, this is coming from *his* mouth, not mine. personally i think its a stupid move to swap cranks unless there is VERY good reason to do so, such as bearing failure or somethign similar and it gets scarred/unbalanced.
i know about the injectors thing...itll just add more fuel and he wont have any way to compensate. unfortunately, he doesnt really understand the concept of this lol. i asked him why he wanted 'performance injectors', just to see if he had a response, and he replied 'more performance'. yeah, ok.
mike: i couldve sworn some HO 305s came in camaros, but if you insist that its not, ill take your word for it. the only difference is the 305 has a 350 head, right? and ill check into edelbrock intakes for him at least, thankee.
mechanic: yup, thats what everyones saying lol. things can be done to them, but theyre limited and more expensive.
purpl: i agree with you wholeheartedly, but unfortunately it doesnt change how much you can do to the 305. hes not looking for a motor swap, hed be in over his head, no offense to him =X
could someone explain why TPI is so much harder to upgrade/mod than a carbed car?
August 2009 ROTM
Joined: Sep 2007
Posts: 1,143
From: Lima, OH and Ft. Lauderdale, FL
ROTM Winner's Club
RE: 305 HO in a 91 camaro RS
ORIGINAL: SideWinderGX
yeah, its a 305 TPI engine, not carbed. i dont have much experience with muscle-ish cars, mainly because my dad knows what they are, how much power they produce and wont let me get one but, the owner of this car really wont go for a motor swap at all...unfortunately. too much work and money. he says he plans on putting a new crankshaft and cams in over the winter.
oh, and on a side note, this is coming from *his* mouth, not mine. personally i think its a stupid move to swap cranks unless there is VERY good reason to do so, such as bearing failure or somethign similar and it gets scarred/unbalanced.
i know about the injectors thing...itll just add more fuel and he wont have any way to compensate. unfortunately, he doesnt really understand the concept of this lol. i asked him why he wanted 'performance injectors', just to see if he had a response, and he replied 'more performance'. yeah, ok.
mike: i couldve sworn some HO 305s came in camaros, but if you insist that its not, ill take your word for it. the only difference is the 305 has a 350 head, right? and ill check into edelbrock intakes for him at least, thankee.
mechanic: yup, thats what everyones saying lol. things can be done to them, but theyre limited and more expensive.
purpl: i agree with you wholeheartedly, but unfortunately it doesnt change how much you can do to the 305. hes not looking for a motor swap, hed be in over his head, no offense to him =X
could someone explain why TPI is so much harder to upgrade/mod than a carbed car?
yeah, its a 305 TPI engine, not carbed. i dont have much experience with muscle-ish cars, mainly because my dad knows what they are, how much power they produce and wont let me get one
but, the owner of this car really wont go for a motor swap at all...unfortunately. too much work and money. he says he plans on putting a new crankshaft and cams in over the winter.oh, and on a side note, this is coming from *his* mouth, not mine. personally i think its a stupid move to swap cranks unless there is VERY good reason to do so, such as bearing failure or somethign similar and it gets scarred/unbalanced.
i know about the injectors thing...itll just add more fuel and he wont have any way to compensate. unfortunately, he doesnt really understand the concept of this lol. i asked him why he wanted 'performance injectors', just to see if he had a response, and he replied 'more performance'. yeah, ok.
mike: i couldve sworn some HO 305s came in camaros, but if you insist that its not, ill take your word for it. the only difference is the 305 has a 350 head, right? and ill check into edelbrock intakes for him at least, thankee.
mechanic: yup, thats what everyones saying lol. things can be done to them, but theyre limited and more expensive.
purpl: i agree with you wholeheartedly, but unfortunately it doesnt change how much you can do to the 305. hes not looking for a motor swap, hed be in over his head, no offense to him =X
could someone explain why TPI is so much harder to upgrade/mod than a carbed car?
FYI, it must have a TBI engine, not a TPI if it is an RS. There are HO motors, but not in the RS. TBI= Throttle body injected, TPI=Tuned Port Injected, huge difference when ordering parts.
Thread Starter
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Newbie
Joined: Mar 2008
Posts: 4
RE: 305 HO in a 91 camaro RS
wow, i typed TPI like 3 times in my other post, i profusely apologize. i meant TBI, throttle body as you said. for some reason i concentrated on purpls post for a long time and it got stuck in my head =X
my friend is...lets not go there he doesnt do his research and relies on people like me (grins) who mostly know what theyre doing, or are willing to spend the time to research stuff. i dont understand why he will spend the time, or say he will, to swap out a crank/cams/internals and not do an engine swap.
no HO motors in the RSs, gotcha...what ones had HO motors then?
thanks for all this info guys, i appreciate it =)
my friend is...lets not go there
he doesnt do his research and relies on people like me (grins) who mostly know what theyre doing, or are willing to spend the time to research stuff. i dont understand why he will spend the time, or say he will, to swap out a crank/cams/internals and not do an engine swap. no HO motors in the RSs, gotcha...what ones had HO motors then?
thanks for all this info guys, i appreciate it =)
4th Gear Member
Joined: Mar 2006
Posts: 2,430
From: Florida
RE: 305 HO in a 91 camaro RS
ORIGINAL: SideWinderGX
wow, i typed TPI like 3 times in my other post, i profusely apologize. i meant TBI, throttle body as you said. for some reason i concentrated on purpls post for a long time and it got stuck in my head =X
my friend is...lets not go there he doesnt do his research and relies on people like me (grins) who mostly know what theyre doing, or are willing to spend the time to research stuff. i dont understand why he will spend the time, or say he will, to swap out a crank/cams/internals and not do an engine swap.
no HO motors in the RSs, gotcha...what ones had HO motors then?
thanks for all this info guys, i appreciate it =)
wow, i typed TPI like 3 times in my other post, i profusely apologize. i meant TBI, throttle body as you said. for some reason i concentrated on purpls post for a long time and it got stuck in my head =X
my friend is...lets not go there
he doesnt do his research and relies on people like me (grins) who mostly know what theyre doing, or are willing to spend the time to research stuff. i dont understand why he will spend the time, or say he will, to swap out a crank/cams/internals and not do an engine swap. no HO motors in the RSs, gotcha...what ones had HO motors then?
thanks for all this info guys, i appreciate it =)
This was the only optional engine for the RS. The Last HO 305 was in 1986 and its was carbed, so forget about any HO (high output) engine in the 1991 RS Camaro.