Black305RS

I found 2 i89 irocs for sale and they both have 305 tpi motors with automatic transmission.
my question is how did the orighinal buyers manage to get 305s matched to an auto tranny.
or more importantly why dont they have the 350 tuned port motor.
i thought that all irocs came with 350s unleess they were convertable or manual transmissions.

89Vert

you can get a TBI Iroc

350 was an option

305 matched with an auto is a bad combo especially in 89

305 stick and 350 got the same cam

305 auto got a different cam it has a wopping 190hp and a 305 stick has 220hp,

IMO the 305 doesn't have enough torque to be backed by a 700R4

1987IROC350

These cars have plenty of traffic light to traffic light torque down low. I have owned dozens (My dad owns a dealership) of 2ND, 3RD and 4 Gen Camaros and Vetts and the TPI cars all perform well. The 305's just give out above highway speeds. It seems your looking for a replacement for your RS. These would blow away your RS and I think you would be happy with the 305TPI performance. The 700R can be modded to shift very quick. You can always put in a new crate or modify the TPI for more power later. If the cars are in good shape don't pass up the chance to get one. I got the info below from the link.
http://www.hotrodsforsale.com/hrfs/t...maro_specs.htm
89 RS M5,A4 LO3 V8 9.3:1 5.0 (305) 170@4400 255@2400 TBI 3.08 ---- 2.73 ----
89 IROC M5,A4 LO3 V8 9.3:1 5.0 (305) 170@4400 255@2400 TBI 3.08 ---- 2.73 ----
89 IROC A4 LB9 V8 9.3:1 5.0 (305) 195@4000 295@2800 TPI ---- ---- 2.73 ----
89 IROC M5 LB9 V8 9.3:1 5.0 (305) 220@4400 290@3200 TPI 3.08 ---- ---- ----
89 IROC M5 LB9 V8 9.3:1 5.0 (305) 230@4600 300@3200 TPI ---- 3.45* ---- ----
89 IROC A4 L98 V8 9.3:1 5.7 (350) 230@4400 330@3200 TPI ---- ---- 2.77*----
89 IROC A4 L98 V8 9.3:1 5.7 (350) 240@4400 345@3200 TPI ---- ---- ---- 3.27*
*Borg-Warner rear axle

Jim85IROC

The majority of the IROCs on the road didn't have the 350, as you're starting to find out. The TPI 305 will be a relatively nice improvement over your TBI car, but the TPI 305 with the auto trans still falls pretty short compared to the 350 or the TPI 305 with a 5 speed. As mentioned above, the TPI 305 with the 5 speed got a better cam, and as a result, produced much better power. Plus, the 5 speed cars generally came with better rear gears than the automatics. All in all, the TPI 5 speed cars were fun, faily powerful cars that in many cases were nearly as fast as the 350 automatics. The TPI 5 speed cars were pretty hard to find though. They weren't nearly as common as the TPI 305 autos or the TPI 350 cars.

For more information on the IROCs, including production numbers, check out www.iroczone.com.

Rottluver

One of the most common combos out there sadly
Cuz that is how most dealerships ordered them........the 5 speed was less popular due to commuting and such things like traffic, etc. If memory serves, the auto allegedly got better gas mileage and the 80's were all about mileage so they (GM) made more of them in the auto configuration to avoid paying CAFE fees. The 5 speed also wasn't available with the TPI until 1987....prior to that, if you wanted a TPI motor you HAD to get the 305/auto combo. Couldn't even get the 350 till 1987 either.
Could not get the 350 in a vert.........the 350 was an extra cost option only available with the auto trans. Much fewer of these around then the 305/auto combos. The standard engine of the 3rd gen IROC (or even Z28) was a 5.0 throttle-body injected (or carburated depending on the year) POS (in my opinion). The vast majority of them came with the auto trans.

87DJP2001

There were 3 engines and two transmissions for the 1987 IROC-Z
LG4 305/Carb standard with Auto/manual
LB9 305/TPI $745 option with Auto/Manual
L98 350/TPI $1045 option + required options for another $850
So if you look at the 350TPI at additional $1900 thats why there are more 305 TIP for the lower cost. Remember this was 1987 and 19+K for a Camaro was a lot of money then.

I bought the 305 TPI for that reason in 1987.

Black305RS

ok i thanks for the replies im actually replacing a 88 2.8 camaro which got totaled over a week ago. im currently driving an 91 firebird 5.0 which ill be trading in for the 89 ioroc i just test drove it a little bit ago and it was amazing i cant wait for my settlement so i can purchase it.

1987IROC350

I would beg the dealer to hold on to it for you or offer a non-refundable deposit if you have found a car you like. They disappear very fast.

Black305RS

they offered to hold it for 100 dollars but i dont have the money unfortunately

Rottluver

:werd: A $500 deposit should hold the car for you.....if not this is not a very good dealer. :\

U posted right before me......I would beg, borrow and plead to find that C-note dude, that car could be gone in 5 minutes.........

305fan

350 IROCs are common---44% had them.

305 TPI 5 speeds are pretty rare.

Camaero

I am getting ready to drop in a 350 but my 305TPI in my 87 IROC is one hell of a motor. The thing has a lot of miles on it and it still pulls great and runs very well. Great motor! Just not too great if you want to hot rod it more. Costs more to get it to run faster than a 350.

Jim85IROC

If you don't even have a spare hundred bucks, I would suggest you buy something like a Toyota or a Honda. These old cars constantly need this and that, and if you can't scrounge up a hundred bucks for a deposit, you'll never be able to afford the routine maintenence these cars need.

Black305RS

That toyota or honda thing is a bit of an insult i will never buy anything that isnt from GM. On another note the routine maintenence isnt that bad in my experience they dont need that much. Anyway i bought it today around noon cst.

89Vert

I know a couple guys into the 13's with basicly stock 305 5 speeds, most 350 cars I know of run mid 14's