4 cyl swap race car

robzstang · 05-11-2001, 09:30 PM

this is too all the people who have swapped a 4 cylinder motor for a V8:

i have an 85 ford mustang coupe that a had a 4cyl in it. i have many questions on what to change since i'm putting a v8 in it and going to run it down the track eventually.

what suspension mods do i need to make? would putting bbk springs and drag struts and shocks be a good combination?

also i'm using an automatic tranny with my 306 engine i'm putting in the car. the car still has the the stock rearend in it. will the rearend withstand the power of the 306 or will i have to change it, along with the driveshaft? i'm not really sure what rearend came in the 85 stang, that is why i'm wondering. i don't want to take it down the track and rip out the rearend.

so any help will be appreciated from anyone.

thanks. rob

89LXCarb · 05-12-2001, 12:50 PM

you will have to upgrade rear ends to the 8.8 because your weak old 4 cyl 7.5 will blow apart under any kind of power.

------------------
4 cyl converted to 302
comp cams cam, ported GT 40 heads, Edelbrock intake, holley carb
Turbo coupe rear with 373's
4 inch cowl hood
finally done after what seemed like forever!!!!!

05-11-2001, 09:30 PM	#1
robzstang Registered Member Join Date: May 2001 Location: martinsville,in usa Posts: 2	4 cyl swap race car this is too all the people who have swapped a 4 cylinder motor for a V8: i have an 85 ford mustang coupe that a had a 4cyl in it. i have many questions on what to change since i'm putting a v8 in it and going to run it down the track eventually. what suspension mods do i need to make? would putting bbk springs and drag struts and shocks be a good combination? also i'm using an automatic tranny with my 306 engine i'm putting in the car. the car still has the the stock rearend in it. will the rearend withstand the power of the 306 or will i have to change it, along with the driveshaft? i'm not really sure what rearend came in the 85 stang, that is why i'm wondering. i don't want to take it down the track and rip out the rearend. so any help will be appreciated from anyone. thanks. rob

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05-12-2001, 12:50 PM	#2
89LXCarb Registered Member Join Date: Jan 2000 Location: Columbus Grove, Ohio, USA Posts: 267	you will have to upgrade rear ends to the 8.8 because your weak old 4 cyl 7.5 will blow apart under any kind of power. ------------------ 4 cyl converted to 302 comp cams cam, ported GT 40 heads, Edelbrock intake, holley carb Turbo coupe rear with 373's 4 inch cowl hood finally done after what seemed like forever!!!!!